參數(shù)資料
型號: SAF-C513A-HN
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, EEPROM, 8 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 66/128頁
文件大?。?/td> 1837K
代理商: SAF-C513A-HN
On-Chip Peripheral Units
Semiconductor Group
6-9
6.1.3 Alternate Functions
The pins of ports 1 and 3 are multifunctional. They are port pins and also serve to implement
alternate functions (special inputs/outputs for on-chip peripherals) as listed in table 6-6-3.
Figure 6-17a shows a functional diagram of a port latch with alternate function. To pass the
alternate function to the output pin and vice versa, however, the gate between the latch and driver
circuit must be open. Thus, to use the alternate input or output functions, the corresponding bit latch
in the port SFR has to contain a one (1); otherwise the pulldown FET is on and the port pin is stuck
at 0. After reset all port latches contain ones (1).
Figure 6-17a
Ports 1 and 3
For port pins P1.2 to P1.5 different structures apply, see figures 6-17b and 6-17c.
MCS01827
D
CLK
Bit
Latch
Q
Internal
Pull Up
Arrangement
Pin
Read
Latch
to
Latch
Read
Pin
Write
V
CC
Int. Bus
Alternate
Output
Function
Alternate
Input
Function
&
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