参数资料
型号: P80C251SB16
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: HIGH-PERFORMANCE CHMOS MICROCONTROLLER
中文描述: 8-BIT, 16 MHz, MICROCONTROLLER, PDIP40
封装: PLASTIC, DIP-40
文件页数: 13/35页
文件大小: 186K
代理商: P80C251SB16
PRELIMINARY
13
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
Table 7. Memory Signal Selections (RD1:0)
RD1:0
P1.7/CEX/
A17/WCLK
P3.7/RD#/A16
PSEN#
WR#
Features
0 0
A17
A16
Asserted for
all addresses
Asserted for writes to
all memory locations
256-Kbyte external
memory
0 1
P1.7/CEX4/
WCLK
A16
Asserted for
all addresses
Asserted for writes to
all memory locations
128-Kbyte external
memory
1 0
P1.7/CEX4/
WCLK
P3.7 only
Asserted for
all addresses
Asserted for writes to
all memory locations
64-Kbyte external
memory. One
additional port pin.
1 1
P1.7/CEX4/
WCLK
RD# asserted
for addresses
7F:FFFFH
Asserted for
80:0000H
Asserted only for
writes to MCS 51
microcontroller data
memory locations.
64-Kbyte external
memory. Compatible
with MCS 51 micro-
controllers.
相关PDF资料
PDF描述
P80C251SQ16 HIGH-PERFORMANCE CHMOS MICROCONTROLLER
P83C251SA16 HIGH-PERFORMANCE CHMOS MICROCONTROLLER
P83C251SB16 HIGH-PERFORMANCE CHMOS MICROCONTROLLER
P83C251SP16 HIGH-PERFORMANCE CHMOS MICROCONTROLLER
P83C251SQ16 HIGH-PERFORMANCE CHMOS MICROCONTROLLER
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