C167CS-L datasheet(13/81 Pages) INFINEON

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C167CS-4R

C167CS-L

Data Sheet

V2.2, 2001-08

P4.0

P4.1

P4.2

P4.3

P4.4

P4.5

P4.6

P4.7

Port 4 is an 8-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. The Port 4 outputs can be configured as

push/pull or open drain drivers. The input threshold of Port 4

is selectable (TTL or special).

Port 4 can be used to output the segment address lines and

for serial interface lines:1)

A16

Least Significant Segment Address Line

A17

Segment Address Line

A18

Segment Address Line

A19

Segment Address Line

A20

Segment Address Line,

CAN2_RxD CAN 2 Receive Data Input

A21

Segment Address Line,

CAN1_RxD CAN 1 Receive Data Input

A22

Segment Address Line,

CAN1_TxD CAN 1 Transmit Data Output,

CAN2_TxD CAN 2 Transmit Data Output

A23

Most Significant Segment Address Line,

CAN1_RxD CAN 1 Receive Data Input,

CAN2_TxD CAN 2 Transmit Data Output,

CAN2_RxD CAN 2 Receive Data Input

External Memory Read Strobe. RD is activated for every

external instruction or data read access.

WR/

WRL

External Memory Write Strobe. In WR-mode this pin is

activated for every external data write access. In WRL-mode

this pin is activated for low byte data write accesses on a

16-bit bus, and for every data write access on an 8-bit bus.

See WRCFG in register SYSCON for mode selection.

READY 97

Ready Input. When the Ready function is enabled, a high

level at this pin during an external memory access will force

the insertion of memory cycle time waitstates until the pin

returns to a low level.

An internal pullup device will hold this pin high when nothing

is driving it.

Table 2

Pin Definitions and Functions (cont’d)

Symbol Pin

Num.

Input

Outp.

Function

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