ST10R172L datasheet(6/68 Pages) STMICROELECTRONICS

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ST10R172L - PIN DESCRIPTION

P3.0 –

P3.13

P3.15

8-21

I/O

A 15-bit (P3.14 is missing) bidirectional I/O port. Port 3 is bit-

wise programmable for input or output via direction bits. For a

pin configured as input, the output driver is put into high-

impedance state. Port 3 outputs can be configured as push/

pull or open drain drivers. The following pins have alternate

functions:

P3.1

T6OUT

GPT2 Timer T6 toggle latch output

P3.2

CAPIN

GPT2 Register CAPREL capture

input

P3.3

T3OUT

GPT1 Timer T3 toggle latch output

P3.4

T3EUD

GPT1 Timer T3 ext.up/down ctrl.input

P3.5

T4IN

GPT1 Timer T4 input for count/gate/

reload/capture

P3.6

T3IN

GPT1 Timer T3 count/gate input

P3.7

T2IN

GPT1 Timer T2 input for count/gate/

reload/capture

P3.10

TxD0

ASC0 clock/data output (asyn./syn.)

I/O

P3.11

RxD0

ASC0 data input (asyn.) or I/O (syn.)

P3.12

BHE

Ext. Memory High Byte Enable Signal

O5T

WRH

Ext. Memory High Byte Write Strobe

P3.15

CLKOUT

System clock output (=CPU clock)

Table 1 Pin definitions

Part Number	Components Description	Html View	Manufacturer
74VCX16374	Low Voltage 16-Bit D-Type Flip-Flop with 3.6V Tolerant Inputs and Outputs	1 2 3 4 5 More	Fairchild Semiconductor
74LCXZ16244	Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs	1 2 3 4 5 More	Fairchild Semiconductor
74VCXH16244	Low Voltage 16-Bit Buffer/Line Driver with Bushold	1 2 3 4 5 More	Fairchild Semiconductor
F74ALVC16245	Low Voltage 16-Bit Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs	1 2 3 4 5 More	Fairchild Semiconductor
74VCXH16374	Low Voltage 16-Bit D-Type Flip-Flop with Bushold	1 2 3 4 5 More	Fairchild Semiconductor
74VCXH16373	Low Voltage 16-Bit Transparent Latch with Bushold	1 2 3 4 5 More	Fairchild Semiconductor
74LVT16646	Low Voltage 16-Bit Transceiver/Register with 3-STATE Outputs	1 2 3 4 5 More	Fairchild Semiconductor
NCP1580	Low Voltage Synchronous Buck Controller	1 2 3 4 5 More	ON Semiconductor
NCV51411	1.5 A 260 kHz Low Voltage Buck Regulator with Synchronization Capability	1 2 3 4 5 More	ON Semiconductor
NUP8100D	Low Capacitance Transient Voltage Suppressor Array	1 2 3 4	ON Semiconductor

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