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C161 Datasheet(PDF) 149 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) 149 Page - Infineon Technologies AG

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3DUDOOHO 3RUWV
User’s Manual
7-23
1999-08
Pin P3.12 (BHE/WRH) is one more pin with an alternate output function. However, its
structure is slightly different (see figure below), because after reset the BHE or WRH
function must be used depending on the system startup configuration. In these cases
there is no possibility to program any port latches before. Thus the appropriate alternate
function is selected automatically. If BHE/WRH is not used in the system, this pin can be
used for general purpose IO by disabling the alternate function (BYTDIS = ‘1’ /
WRCFG=’0’).
Figure 7-14
Block Diagram of Pins P3.15 (CLKOUT/FOUT) and P3.12 (BHE/WRH)
Note: Enabling the BHE or WRH function automatically enables the P3.12 output driver.
Setting bit DP3.12=’1’ is not required.
Enabling the CLKOUT function automatically enables the P3.15 output driver.
Setting bit DP3.15=’1’ is not required.
Port Output
Latch
0
1
0
1
Driver
Clock
Pin
Direction
Latch
0
1
Input
Latch
Internal Bus
AltDataOut
AltEN
AltDir = ’1’
P3.15, P3.12



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