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P912XDP512F0MPVR 数据表(PDF) 818 Page - Freescale Semiconductor, Inc

部件名 P912XDP512F0MPVR
功能描述  HCS12X Microcontrollers
PDF  1348 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

P912XDP512F0MPVR 数据表(HTML) 818 Page - Freescale Semiconductor, Inc

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Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.21
820
Freescale Semiconductor
22.3.2
Register Descriptions
Table 22-3 summarizes the effect on the various configuration bits, data direction (DDR), output level
(IO), reduced drive (RDR), pull enable (PE), pull select (PS), and interrupt enable (IE) for the ports.
The configuration bit PS is used for two purposes:
1. Configure the sensitive interrupt edge (rising or falling), if interrupt is enabled.
2. Select either a pull-up or pull-down device if PE is active.
NOTE
All register bits in this module are completely synchronous to internal
clocks during a register read.
Table 22-3. Pin Configuration Summary
DDR
IO
RDR
PE
PS1
1 Always “0” on Port A, B, C, D, E, K, AD0, and AD1.
IE2
2 Applicable only on Port P, H, and J.
Function
Pull Device
Interrupt
0
x
x
0
x
0
Input
Disabled
Disabled
0
x
x
1
0
0
Input
Pull Up
Disabled
0
x
x
1
1
0
Input
Pull Down
Disabled
0
x
x
0
0
1
Input
Disabled
Falling edge
0
x
x
0
1
1
Input
Disabled
Rising edge
0
x
x
1
0
1
Input
Pull Up
Falling edge
0
x
x
1
1
1
Input
Pull Down
Rising edge
1
0
0
x
x
0
Output, full drive to 0
Disabled
Disabled
1
1
0
x
x
0
Output, full drive to 1
Disabled
Disabled
1
0
1
x
x
0
Output, reduced drive to 0
Disabled
Disabled
1
1
1
x
x
0
Output, reduced drive to 1
Disabled
Disabled
1
0
0
x
0
1
Output, full drive to 0
Disabled
Falling edge
1
1
0
x
1
1
Output, full drive to 1
Disabled
Rising edge
1
0
1
x
0
1
Output, reduced drive to 0
Disabled
Falling edge
1
1
1
x
1
1
Output, reduced drive to 1
Disabled
Rising edge



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