參數(shù)資料
型號： GMS81C5032-XXXPLT
英文描述： MICROCONTROLLER|8-BIT|CMOS|LDCC|44PIN|PLASTIC
中文描述： 單片機(jī)| 8位|的CMOS | LDCC | 44PIN |塑料
文件頁數(shù)： 40/93頁
文件大?。?/td> 853K
代理商： GMS81C5032-XXXPLT
GMS81C1404/GMS81C1408
38
June. 2001 Ver 1.2
10.3 RC and RCIO registers
RC is an 4-bit bidirectional I/O port (address C4
H
). Each
pin can be set individually as input and output through the
RCIO register (address C5
H
).
In addition, Port RC is multiplexed with Serial Peripheral
Interface (SPI).
The control register SIOM (address E0
H
) controls to select
Serial Peripheral Interface function.
After reset, the RCIO register value is “0”, port may be
used as general I/O ports. To select Serial Peripheral Inter-
face function, write “1” to the corresponding bit of SIOM.
Figure 10-4 Registers of Port RC
Table 10-1 Serial Communication Functions in RC Port
PORT
Function
SIOM
Description
SRDY
SM [1:0]
SCK [1:0]
RC6/
SOUT
RC6
X
X:0
X:X
RC6 (Normal I/O Port)
SOUT
X
X:1
X:X
SPI Serial Data Output
RC5/
SIN
RC5
X
0:X
X:X
RC5 (Normal I/O Port)
SIN
X
1:X
X:X
SPI Serial Data Input
RC4/
SCK
RC4
X
0:0
X:X
RC4 (Normal I/O Port)
SCKO
X
0:0
00, 01, 10
SPI Synchronous Clock Output
SCKI
X
0:0
1:1
SPI Synchronous Clock Input
RC3/
SRDY
RC3
0
X:X
X:X
RC3 (Normal I/O Port)
SRDYIN
1
X:X
00, 01, 10
SPI Ready Input (Master Mode)
SRDYOUT
1
X:X
1:1
SPI Ready Output (Slave Mode)
-
-
-
INPUT / OUTPUT DATA
0 : INPUT PORT
1 : OUTPUT PORT
DIRECTION SELECT
RC Data Register
RC
ADDRESS : C4H
RESET VALUE : Undefined
RC Direction Register
RCIO
ADDRESS : C5H
RESET VALUE : -0000---
-
RC6 RC5 RC4 RC3
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