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參數(shù)資料
| 型號： | MSM81C55-5RS |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 2048-Bit CMOS STATIC RAM WITH I/O PORTS AND TIMER |
| 中文描述： | 2048位CMOS靜態(tài)RAM與I / O端口和定時器 |
| 文件頁數(shù)： | 10/19頁 |
| 文件大小： | 156K |
| 代理商： | MSM81C55-5RS |
10/19
Semiconductor
MSM81C55-5RS/GS/JS
OPERATION
Description
The MSM81C55-5 has three functions as described below.
2K-bit static RAM (256 words
￥
8 bits)
Two 8-bit I/O ports (PA and PB) and a 6-bit I/O port (PC)
14-bit timer counter
The internal register is shown in the figure below, and the I/O addresses are described in the
table below.
8 Bit Internal Data Bus
Command
Status
PC
6 Bit
PB
8 Bit
PA
8 Bit
Timer
MSB
Timer
LSB
Timer Mode
A
7
￥
￥
￥
￥
￥
I/O Address
A
4
￥
￥
￥
￥
￥
Selecting Register
￥
Internal command/status register
Universal I/O port A (PA)
Universal I/O port B (PB)
I/O port C (PC)
Timer count lower position 8 bits (LSB)
Timer count upper position 6 bits and timer mode
2 bits (MSB)
A
6
￥
￥
￥
￥
￥
￥
A
5
￥
￥
￥
￥
￥
￥
￥
A
3
￥
￥
￥
￥
￥
￥
A
2
0
0
0
0
1
1
A
1
0
0
1
1
0
0
A
0
0
1
0
1
0
1
￥
: Don't care.
相關PDF資料 |
PDF描述 |
|---|---|
| MSM81C55-5 | 2k-bit Static RAM (256 bytes) With Parallel I/O Ports And A Timer(擴展CPU的RAM、定時器和I/O口) |
| MSM82C37B-5GS | PROGRAMMABLE DMA CONTROLLER |
| MSM82C43 | INPUT/OUTPUT PORT EXPANDER |
| MSM82C51A-2GS | UNIVERSAL SYNCHRONOUS ASYNCHRONOUS RECEIVER TRANSMITTER |
| MSM82C51A-2JS | UNIVERSAL SYNCHRONOUS ASYNCHRONOUS RECEIVER TRANSMITTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MSM82C37B-5GS | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:PROGRAMMABLE DMA CONTROLLER |
| MSM82C37B-5JS | 制造商:OK International 功能描述:4 CHANNEL(S), 5 MHZ, DMA CONTROLLER, PQCC44 |
| MSM82C37B-5RS | 制造商:OK International 功能描述:4 CHANNEL(S), 5 MHz, DMA CONTROLLER, PDIP40 |
| MSM82C37B-5VJS | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:PROGRAMMABLE DMA CONTROLLER |
| MSM82C43 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:INPUT/OUTPUT PORT EXPANDER |
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