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| 型號(hào)： | MC68HC16Y1 |
| 廠(chǎng)商： | Motorola, Inc. |
| 英文描述： | 16-Bit Modular Microcontroller(16位模塊化微控制器) |
| 中文描述： | 16位微控制器模塊（16位模塊化微控制器） |
| 文件頁(yè)數(shù)： | 61/122頁(yè) |
| 文件大?。?/td> | 749K |
| 代理商： | MC68HC16Y1 |
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MC68HC16Y1
MC68HC16Y1TS/D
MOTOROLA
61
Chip select assertion can be synchronized with bus control signals to provide output enable, read/write
strobes, or interrupt acknowledge signals. Logic can also generate DSACK signals internally. A single
DSACK generator is shared by all circuits — multiple chip selects assigned to the same address and
control must have the same number of wait states. Chip selects can also be synchronized with the
ECLK signal available on ADDR23.
When a memory access occurs, chip select logic compares address space type, address, type of ac-
cess, transfer size, and interrupt priority (in the case of interrupt acknowledge) to parameters stored in
chip select registers. If all parameters match, the appropriate chip select signal is asserted. Select sig-
nals are active low. A block diagram of a chip select circuit is shown below.
Figure 7 Chip Select Circuit Block Diagram
If a chip select function is given the same address as a microcontroller module or memory array, an
access to that address will go to the module or array, and the chip select signal will not be asserted.
Each chip select pin can have two or more functions. Chip select configuration out of reset is determined
by operating mode. In all modes, the boot ROM select signal is automatically asserted out of reset. In
single-chip mode, all chip select pins except CS10 and CS0 are configured for alternate functions or
discrete output. In expanded modes, appropriate pins are configured for chip select operation, but chip
select signals cannot be asserted until a transfer size is chosen. In fully expanded mode, data bus pins
can be held low to enable alternate functions for chip select pins.
The following table shows allocation of chip selects and discrete outputs to MCU pins.
CHIP SEL BLOCK
AVEC
GENERATOR
DSACK
GENERATOR
PIN
ASSIGNMENT
REGISTER
PIN
DATA
REGISTER
BASE ADDRESS REGISTER
TIMING
AND
CONTROL
ADDRESS COMPARATOR
OPTION COMPARE
OPTION REGISTER
AVEC
DSACK
PIN
BUS CONTROL
INTERNAL
SIGNALS
ADDRESS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC16Z1CAG | 制造商:Freescale Semiconductor 功能描述: |
| MC68HC16Z1CAG16 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線(xiàn)寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG16 | 制造商:Freescale Semiconductor 功能描述:IC16-BIT MICROCONTROLLER |
| MC68HC16Z1CAG20 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線(xiàn)寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG20 | 制造商:Freescale Semiconductor 功能描述:Microcontroller |
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