UPSD3422_06 Datasheet, PDF (72/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

I/O ports of mcu module
Figure 18. MCU I/O cell block diagram for port 3
Enable_I2C
Select_Alternate_Func
Digital_Alt_Func_Data_Out
P3.X SFR Read Latch
(for R-M-W instructions)
MCU_Reset
8032 Data Bus Bit
GPIO P3.X SFR
Write Latch
Disables High-Side Driver
DELAY,
1 MCU_CLK
PRE
D
Q
SFR
P3.X
Latch _Q
IN 1 ^SEL
MUX Y
IN 0
DELAY,
1 MCU_CLK
P3.X SFR Read Pin
Digital_Pin_Data_In
Figure 19. MCU I/O cell block diagram for port 4
Enable_Push_Pull
Select_Alternate_Func
Digital_Alt_Func_Data_Out
P4.X SFR Read Latch
(for R-M-W instructions)
MCU_Reset
8032 Data Bus Bit
GPIO P4.X SFR
Write Latch
For PCA Alternate Function
DELAY,
1 MCU_CLK
PRE
D
Q
SFR
P4.X
Latch _Q
IN 1 ^SEL
MUX Y
IN 0
DELAY,
1 MCU_CLK
P4.X SFR Read Pin
Digital_Pin_Data_In
uPSD34xx
VCC
VCC
WEAK
PULL-UP, B
HIGH
SIDE
VCC
STONGER
PULL-UP, A
P3.X Pin
LOW
SIDE
AI09601
VCC
VCC
WEAK
PULL-UP, B
HIGH
SIDE
VCC
STONGER
PULL-UP, A
P4.X Pin
LOW
SIDE
AI09602
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