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)

9.2.6 Port B

Table 10. Port B Description

PORT B

PB0

PB1

PB2

PB3

Input*

floating

floating

floating

floating

PB4

floating

PB5

floating

PB6

floating

PB7

*Reset State

floating

I/O

Alternate Function

Output

Signal

Condition

push-pull (high sink) MCO (Main Clock Output) MCO = 1 (MISCR)

push-pull (high sink) RDI

SCI enabled

push-pull (high sink) TDO

TE = 1 (SCICR2)

push-pull (high sink) ARTCLK

EXCL = 1 (ARTCSR)

ARTIC1

ART Timer enabled

push-pull (high sink)

IT5 Schmitt triggered input IT5E = 1 (ITRFRE1)

ARTIC2

ART Timer enabled

push-pull (high sink)

IT6 Schmitt triggered input IT6E = 1 (ITRFRE1)

PWM1

OE0 = 1 (PWMCR)

push-pull (high sink)

IT7 Schmitt triggered input IT7E = 1 (ITRFRE1)

PWM2

OE1 = 1 (PWMCR)

push-pull (high sink)

IT8 Schmitt triggered input IT8E = 1 (ITRFRE1)

Figure 27. Port B and Port C [7:2] Configuration

ALTERNATE 1

OUTPUT

0

ALTERNATE ENABLE

VDD

P-BUFFER

DR

LATCH

DDR

LATCH

DDR SEL

ALTERNATE ENABLE

PULL-UP*

VDD

PAD

DR SEL

1

ALTERNATE INPUT

0

N-BUFFER

ALTERNATE ENABLE

VSS

CMOS SCHMITT TRIGGER

DIODES

* PULL-UP ON PORT C [7:2] ONLY

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