參數(shù)資料
型號(hào): W78IRD2A
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 21/76頁
文件大?。?/td> 646K
代理商: W78IRD2A
W78IRD2/W78IRD2A
Publication Release Date: February 14, 2007
- 21 -
Revision A9
BIT
NAME
FUNCTION
7, 6
P41FUN1
P41FUN0
P4.1 function control bits, similar to P43FUN1 and P43FUN0 below.
5, 4
P41CMP1
P41CMP0
P4.1 address-comparator length control bits, similar to P43CMP1 and
P43CMP0 below.
3, 2
P40FUN1
P40FUN0
P4.0 function control bits, similar to P43FUN1 and P43FUN0 below.
1, 0
P40CMP1
P40CMP0
P4.0 address-comparator length control bits, similar to P43CMP1 and
P43CMP0 below.
Port 4 Control Register B
Bit:
7
6
5
4
3
2
1
0
P43FUN1 P43FUN0 P43CMP1 P43CMP0 P42FUN1 P42FUN0 P42CMP1 P42CMP0
Mnemonic: P4CONB Address: C3h
BIT
NAME
FUNCTION
7, 6
P43FUN1
P43FUN0
00: Mode 0. P4.3 is a general purpose I/O port, like Port 1.
01: Mode 1. P4.3 is a read-strobe signal for chip-select purposes. The
address range depends on SFR P43AH, P43AL, P43CMP1 and
P43CMP0.
10: Mode 2. P4.3 is a write-strobe signal for chip-select purposes. The
address range depends on SFR P43AH, P43AL, P43CMP1 and
P43CMP0.
11: Mode 3. P4.3 is a read/write-strobe signal for chip-select purposes. The
address range depends on SFR P43AH, P43AL, P43CMP1, and
P43CMP0.
5, 4
P43CMP1
P43CMP0
Chip-select signal address comparison:
00: Compare the full 16-bit address with P43AH and P43AL.
01: Compare the 15 MSB of the 16-bit address with P43AH and P43AL.
10: Compare the 14 MSB of the 16-bit address with P43AH and P43AL.
11: Compare the 8 MSB of the 16-bit address with P43AH.
3, 2
P42FUN1
P42FUN0
P4.2 function control bits, similar to P43FUN1 and P43FUN0 above.
1, 0
P42CMP1
P42CMP0
P4.2 address-comparator length control bits, similar to P43CMP1 and
P43CMP0 above.
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