ST90135M5Q6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST90135M5Q6

8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM

STMicroelectronics 

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ST90158 - I/O PORTS

INPUT/OUTPUT BIT CONFIGURATION (Cont’d)

Figure 50. Basic Structure of an I/O Port Pin

I/O PIN

PUSH-PULL

TRIS TAT E

OPEN DRAIN

WEAK PULL-UP

FROM

PERIPHERAL

OUTPUT

OUTPUT SLAVE LATCH

ALTERNATE

FU NCTIO N

INPUT

OUTPUT

BIDIRE CTIONA L

OUTPUT

OUTPUT MASTER LATCH

TTL / CMOS

(or Schmitt Trigger)

TO PERIPHERAL

INPUTS AND

INTERRUPTS

INPUT

BIDIRECTIONAL

ALTERNATE

FUNCTION

INPUT LATCH

Figure 51. Input Configuration

I/O PIN

INTERNAL DATA BUS

Figure 52. Output Configuration

I/O PIN

TRISTATE

OUTPUT SLAVE LATCH

TTL / CMOS

(or Schmitt Trigger)

TO PERIPHERAL

INPUTS AND

INTERRUPTS

OPEN DRAIN

PUSH-PULL

OUTPUT SLAVE LATCH

TTL

(or Schmitt Trigger)

TO PERIPHERAL

INPUTS AND

INTERRUPTS

OUTPUT MASTER LATCH

INPUT LATCH

INTERNAL DATA BUS

n

n

OUTPUT MASTER LATCH

INPUT LATCH

INTERNAL DATA BUS

n

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