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C161 Datasheet(PDF) 137 Page - Infineon Technologies AG

Part # C161
Description  16-Bit Single-Chip Microcontroller
PDF  400 Pages
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

C161 Datasheet(HTML) 137 Page - Infineon Technologies AG

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3DUDOOHO 3RUWV
User’s Manual
7-11
1999-08
Figure 7-6
PORT0 IO and Alternate Functions
When an external bus mode is enabled, the direction of the port pin and the loading of
data into the port output latch are controlled by the bus controller hardware. The input of
the port output latch is disconnected from the internal bus and is switched to the line
labeled “Alternate Data Output” via a multiplexer. The alternate data can be the 16-bit
intrasegment address or the 8/16-bit data information. The incoming data on PORT0 is
read on the line “Alternate Data Input”. While an external bus mode is enabled, the user
software should not write to the port output latch, otherwise unpredictable results may
occur. When the external bus modes are disabled, the contents of the direction register
last written by the user becomes active.
P0H.7
P0H.6
P0H.5
P0H.4
P0H.3
P0H.2
P0H.1
P0H.0
P0L.7
P0L.6
P0L.5
P0L.4
P0L.3
P0L.2
P0L.1
P0L.0
PORT0
D7
D6
D5
D4
D3
D2
D1
D0
P0H
P0L
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
A15
A14
A13
A12
A11
A10
A9
A8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
Alternate Function
a)
b)
c)
d)
General Purpose
Input/Output
8-bit
Demux Bus
16-bit
Demux Bus
8-bit
MUX Bus
16-bit
MUX Bus



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