ST72621L4M1(2002) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72621L4M1
(Rev.:2002)

LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, FLASH OR ROM MEMORY, LVD, WDG, 10-BIT ADC, 2 TIMERS, SCI, SPI

STMicroelectronics 

ST7262

I/O PORTS (Cont’d)

9.2.5 Port A

Table 9. Port A Description

PORT A

I/O

Input*

Output

PA0

floating

push-pull

PA1

floating

PA2

floating

PA3

PA4

PA5

PA6

PA7

*Reset State

floating

floating

floating

floating

floating

push-pull

push-pull

push-pull

push-pull

push-pull

push-pull

push-pull

Alternate Function

Signal

Condition

USBOE

USBOE = 1 (MISC)

IT1 Schmitt triggered input IT1E = 1 (ITRFRE1)

AIN0 (ADC)

CS[2:0] = 000 (ADCCSR)

IT2 Schmitt triggered input IT2E = 1 (ITRFRE1)

AIN1 (ADC)

CS[2:0] = 001 (ADCCSR)

IT3 Schmitt triggered input IT3E = 1 (ITRFRE1)

AIN2 (ADC)

CS[2:0] = 010 (ADCCSR)

IT4 Schmitt triggered input IT4E = 1 (ITRFRE1)

AIN3 (ADC)

CS[2:0] = 011 (ADCCSR)

AIN4 (ADC)

CS[2:0] = 100 (ADCCSR)

AIN5 (ADC)

CS[2:0] = 101 (ADCCSR)

AIN6 (ADC)

CS[2:0] = 110 (ADCCSR)

AIN7 (ADC)

CS[2:0] = 111 (ADCCSR)

Figure 26. PA[7:0] Configuration

ALTERNATE ENABLE

ALTERNATE 1

OUTPUT

0

DR

LATCH

ALTERNATE ENABLE

DDR

LATCH

ANALOG ENABLE

(ADC)

VDD

VDD

P-BUFFER

PAD

DDR SEL

ANALOG

SWITCH

N-BUFFER

DIODES

DR SEL

1

ALTERNATE ENABLE

DIGITAL ENABLE

0

VSS

ALTERNATE INPUT

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