LH77790B User’s Guide
Table of Contents
xi
Counter/Timer Modes...............................................................................................11-8
Counter/Timer Mode Diagrams............................................................................11-9
Mode 0: Interrupt on Terminal Count ...............................................................11-9
Mode 1: Hardware Retriggerable One-shot ...................................................11-11
Mode 2: Rate Generator.................................................................................11-11
Mode 3: Square Wave Generator ..................................................................11-14
Mode 4: Software Triggered Strobe ...............................................................11-14
Mode 5: Hardware Triggered Strobe..............................................................11-17
Mode Summary..............................................................................................11-19
Chapter 12 Watchdog Timer
Introduction...............................................................................................................12-1
Features...................................................................................................................12-1
Block Diagram..........................................................................................................12-1
Register Map............................................................................................................12-2
General Operation....................................................................................................12-2
Register Description.................................................................................................12-3
Watchdog Control Register (WDCTLR) ...............................................................12-3
Watchdog Counter Register (WDCNTR)..............................................................12-4
Protection Mechanism..............................................................................................12-4
Chapter 13 Program Peripheral Interface (PPI)
Introduction...............................................................................................................13-1
Applications..............................................................................................................13-1
Features...................................................................................................................13-1
Block Diagram
External Interface.....................................................................................................13-2
Register Map............................................................................................................13-3
Upon Reset ..............................................................................................................13-3
Ports A, B, and C......................................................................................................13-3
Register Description.................................................................................................13-4
PPI Control Register (PPI_CTLR)........................................................................13-4
Definition of Bits[6:0] in MODE Selection (Bit[7] = 1) .......................................13-4
Definition of Bits[6:0] in Set/Reset of Port C (Bit[7] = 0)...................................13-5
Interrupt Control .......................................................................................................13-6
Operating Modes......................................................................................................13-6
MODE Selection...................................................................................................13-6
MODE 0 – Basic...................................................................................................13-7
MODE 1 (Strobed)..............................................................................................13-10
MODE 1 Input Control Signal Definitions
(Group A and Group B) ..................................................................................13-11
MODE 1 Output Control Signal Definition
(Group A and Group B) ..................................................................................13-13
MODE 2 – Strobed Bi-Directional (Port A Only).................................................13-15
MODE 2 Bidirectional Control Signal Definition .............................................13-16
MODE Definition Summary ................................................................................13-18
Port Writes..............................................................................................................13-19