gc80c521a CORERIVER Semiconductor, gc80c521a Datasheet - Page 30

• Manufacturer Part Number: gc80c521a
• Description: Flash / Isp / Iap 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

P4TYP (BDh) : Port 4 Type Control Register
P4DIR (E5h) : Port 4 Input/Output Control Register
P4SEL (D5h) : Port 4 Pull-up Control Register
P4TYPE.7
P4DIR.7
P4SEL.7
R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1)
R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0)
R/W(0) R/W(0) R/W(1) R/W(1) R/W(0) R/W(0) R/W(0) R/W(0)
6.5. I/O Ports : PORT4[7]
Open-drain or push-pull output, pull-up control, ADC input.
The alternative functions are available only when the corresponding SFR bit is “1”.
Read-Modify-Write instructions do not read port pin but the port SFR.
0 = Push-pull Output / 1 = Open-drain Output (Default)
0 = Output / 1 = Input (Default)
0 = Pull-up resistor ON (Default) / 1 = OFF
P4TYPE.6 P4TYPE.5 P4TYPE.4 P4TYPE.3 P4TYPE.2 P4TYPE.1 P4TYPE.0
P4DIR.6 P4DIR.5 P4DIR.4 P4DIR.3 P4DIR.2 P4DIR.1 P4DIR.0
P4.7 = RESET, MDS_SDA
ANL
P4SEL.6 P4SEL.5 P4SEL.4 P4SEL.3 P4SEL.2 P4SEL.1 P4SEL.0
/
ORL
/
XRL
/
JBC
/
CPL
/
INC
/
DEC
/
DJNZ
CPU BUS
Alternative Output
P4 (B3h) : Port 4 Register
R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1)
P4.7
P4DIR.7
SFR
P4.7
QB
Digital Input
Q
P4.6
P4.5
P4TYP.7
MiDAS1.0B Family
P4.4
1
0
P4.3
P4.2
P4.1
P4.0
P4SEL.7
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P4.7