C161O datasheet(12/66 Pages) INFINEON

12 / 66 page

C161K

C161O

Data Sheet

V2.0, 2001-01

Note: The following behavioral differences must be observed when the bidirectional

reset is active:

• Bit BDRSTEN in register SYSCON cannot be changed after EINIT and is cleared

automatically after a reset.

• The reset indication flags always indicate a long hardware reset.

• The PORT0 configuration is treated like on a hardware reset. Especially the bootstrap

loader may be activated when P0L.4 is low.

• Pin RSTIN may only be connected to external reset devices with an open drain output

driver.

• A short hardware reset is extended to the duration of the internal reset sequence.

P2.9

P2.10

P2.11

P2.12

Port 2 is a 7-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 2 outputs can be configured as push/

pull or open drain drivers. The following Port 2 pins serve for

alternate functions:

EX1IN

Fast External Interrupt 1 Input

EX2IN

Fast External Interrupt 2 Input

EX3IN

Fast External Interrupt 3 Input

EX4IN

Fast External Interrupt 4 Input

EX5IN

Fast External Interrupt 5 Input

EX6IN

Fast External Interrupt 6 Input

EX7IN

Fast External Interrupt 7 Input

These external interrupts are only available in the C161O.

P5.14

P5.15

Port 5 is a 2-bit input-only port with Schmitt-Trigger char. The

pins of Port 5 also serve as timer inputs:

T4EUD

GPT1 Timer T4 External Up/Down Control Input

T2EUD

GPT1 Timer T2 External Up/Down Control Input

VDD

4, 22,

37, 64

–

Digital Supply Voltage:

+ 5 V or + 3 V during normal operation and idle mode.

≥ 2.5 V during power down mode.

VSS

1, 21,

38, 63

–

Digital Ground.

Table 2

Pin Definitions and Functions (cont’d)

Symbol Pin

Num

Input

Outp.

Function

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