C161O datasheet(9/66 Pages) INFINEON

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C161K

C161O

Data Sheet

V2.0, 2001-01

Table 2

Pin Definitions and Functions

Symbol Pin

Num

Input

Outp.

Function

XTAL1

XTAL2

XTAL1:

Input to the oscillator amplifier and input

to the internal clock generator

XTAL2:

Output of the oscillator amplifier circuit.

To clock the device from an external source, drive XTAL1,

while leaving XTAL2 unconnected. Minimum and maximum

high/low and rise/fall times specified in the AC

Characteristics must be observed.

Port 3 is a 12-bit bidirectional I/O port. It 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 Port 3 pins serve for following

alternate functions:

P3.2

CAPIN

GPT2 Register CAPREL Capture Input

This alternate input is only available in the C161O.

P3.3

P3.4

P3.5

P3.6

P3.7

P3.8

P3.9

P3.10

P3.11

P3.12

P3.13

I/O

T3OUT

GPT1 Timer T3 Toggle Latch Output

T3EUD

GPT1 Timer T3 External Up/Down Control Input

T4IN

GPT1 Timer T4 Count/Gate/Reload/Capture Inp

T3IN

GPT1 Timer T3 Count/Gate Input

T2IN

GPT1 Timer T2 Count/Gate/Reload/Capture Inp

MRST

SSC Master-Receive/Slave-Transmit Inp./Outp.

MTSR

SSC Master-Transmit/Slave-Receive Outp./Inp.

TxD0

ASC0 Clock/Data Output (Async./Sync.)

RxD0

ASC0 Data Input (Async.) or Inp./Outp. (Sync.)

BHE

External Memory High Byte Enable Signal,

WRH

External Memory High Byte Write Strobe

SCLK

SSC Master Clock Output / Slave Clock Input

P4.0

P4.1

P4.2

P4.3

P4.4

P4.5

Port 4 is a 6-bit bidirectional I/O port. It 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 4 can be used to output the segment

address lines:

A16 Least Significant Segment Address Line

A17 Segment Address Line

A18 Segment Address Line

A19 Segment Address Line

A20 Segment Address Line

A21 Most Significant Segment Address Line

C161O Datasheet(PDF) 9 Page - Infineon Technologies AG

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