UPSD3422_06 Datasheet, PDF (71/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

uPSD34xx
I/O ports of mcu module
CPL, INC, DEC, DJNZ, MOV, CLR, and SETB. All other types of reads to port SFRs will
read the actual pin logic level and not the port latch. This is consistent with 8051
architecture.
Figure 16. MCU module port pin function routing
ADC (8)
GPIO (8)
UART0 (2)
TIMER0/1 (4)
I2C (2)
GPIO (8)
SFR
MCU Module ^Ports
SFR
8
P3
SFR
8
P1
SFR
TIMER2 (2)
UART1 (2)
SPI (4)
PCA (8)
SFR
GPIO (8)
SFR
8
P4
M
8032 MCU Low Addr & Data[7:0] 8
C
CORE
U
A
D
8 Hi Address [15:8]
(Available on PSD
Module Pins)
C
RD, WR, PSEN, ALE ⁴
N
T
L
On 80-pin
Devices
Only
Figure 17. MCU I/O cell block diagram for port 1
Select_Alternate_Func
Digital_Alt_Func_Data_Out
P1.X SFR Read Latch
(for R-M-W instructions)
MCU_Reset
8032 Data Bus Bit
GPIO P1.X SFR
Write Latch
DELAY,
1 MCU_CLK
PRE
D
Q
SFR
P1.X
Latch _Q
IN 1 ^SEL
MUX Y
IN 0
DELAY,
1 MCU_CLK
AI09199b
VCC
VCC
WEAK
PULL-UP, B
HIGH
SIDE
VCC
STONGER
PULL-UP, A
P1.X Pin
LOW
SIDE
P1.X SFR Read Pin
Analog_Alt_Func_En
Digital_Pin_Data_In
Analog_Pin_In
AI09600
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