Table of Contents
(continued)
Contents
Page
Agere Systems Inc.
3
Data Sheet
July 2001
T8302 Internet Protocol Telephone
Advanced RISC Machine (
ARM
)
6.1.1 DMA Transfer Setup Procedure ..........................................................................................................57
6.1.2 DMA Mode 0. Memory-to-Memory in Blocks of Burst Count Size ......................................................58
6.1.3 Mode 1. Peripheral-to-Memory in Blocks of Burst Count Size ............................................................58
6.1.4 Mode 2. Memory-to-Peripheral in Blocks of Burst Count Size ............................................................59
6.1.4.1 Software-Triggered DMA Mode ..............................................................................................60
6.2 DMA Registers ..............................................................................................................................................61
6.2.1 DMA Control Registers for Channels [0:3] ..........................................................................................62
6.2.2 DMA Source Address Registers for Channels [0:3] ............................................................................63
6.2.3 DMA Preload Destination Start Address Registers for Channels [0:3] ...............................................64
6.2.4 DMA Preload Transfer Count Registers for Channels [0:3] ................................................................65
6.2.5 DMA Transfer Count Registers for Channels [0:3] ..............................................................................65
6.2.6 DMA Burst and Hold Count Registers .................................................................................................65
6.2.7 DMA Status Register ...........................................................................................................................66
6.2.8 DMA Interrupt Register .......................................................................................................................68
6.2.9 DMA Interrupt Enable Register ...........................................................................................................68
7 Programmable Timers ........................................................................................................................................70
7.1 Timers Operation ..........................................................................................................................................70
7.2 Interval Timer (IT) .........................................................................................................................................70
7.3 Watchdog Timer ...........................................................................................................................................71
7.4 Timer Registers ............................................................................................................................................73
7.4.1 Count Rate Register ............................................................................................................................74
7.4.2 Encoding of Interval Timer Count Rates (ITR) and Watchdog Timer Count Rates (WTR) .................74
7.4.3 WT Timer Count Register ...................................................................................................................75
7.4.4 Timer Status Register .........................................................................................................................75
7.4.5 Timer Interrupt Mask Register .............................................................................................................75
7.4.6 Timer Control Register ........................................................................................................................76
7.4.7 IT Count Registers ..............................................................................................................................77
8 External Memory Interface (EMI) ........................................................................................................................78
8.1 IPT_
ARM
Processor Memory Map ...............................................................................................................78
8.2 External FLASH/SRAM Memory Interface (EMI FLASH) .............................................................................78
8.3 EMI FLASH Memory Access ........................................................................................................................78
8.3.1 External Write ......................................................................................................................................78
8.3.2 External Read .....................................................................................................................................79
8.3.3 Wait-States ..........................................................................................................................................79
8.3.4 Hold State ...........................................................................................................................................79
8.3.5 Hold Disable ........................................................................................................................................79
8.3.6 Error Conditions ..................................................................................................................................79
8.4 ROM/RAM Remapping .................................................................................................................................83
8.4.1 Programmable Addresses ...................................................................................................................83
8.5 EMI FLASH Registers ...................................................................................................................................84
8.5.1 Chip Select Configuration Register FLASH_CS .................................................................................84
8.5.2 Chip Select Configuration Registers CS1, CS2, CS3 .........................................................................85
8.5.3 Hold and Wait-States Encoding ..........................................................................................................87
8.5.4 Chip Select Base Address Registers FLASH_CS, CS1, CS2, CS3, Internal SRAM ..........................87
8.5.5 Block Size Field Encoding ...................................................................................................................88
8.5.6 Status Register ....................................................................................................................................88
8.5.7 Options Register .................................................................................................................................89
8.6 External SDRAM Memory Interface ..............................................................................................................89
8.6.1 External SDRAM Memory Map ...........................................................................................................89
8.6.2 SDRAM Memory Range Base Address Register ................................................................................90