mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 563

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

You can calculate the selected period depending of APICLK as:
Freescale Semiconductor
Period = 2*(APIR[11:0] + 1) * 0.1 ms or period = 2*(APIR[11:0] + 1) * bus clock period
1
When trimmed within specified accuracy. See electrical specifications for details.
APICLK
Table 14-8. Selectable Autonomous Periodical Interrupt Periods
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
MC9S12XDP512 Data Sheet, Rev. 2.17
APIR[11:0]
FFD
FFE
FFD
FFE
FFF
FFF
000
001
002
003
004
005
000
001
002
003
004
005
.....
.....
8188 * bus clock period
8190 * bus clock period
8192 * bus clock period
10 * bus clock period
12 * bus clock period
2 * bus clock period
4 * bus clock period
6 * bus clock period
8 * bus clock period
Selected Period
818.8 ms
819.2 ms
819 ms
0.2 ms
0.4 ms
0.6 ms
0.8 ms
1.0 ms
1.2 ms
Chapter 14 Voltage Regulator (S12VREG3V3V5)
.....
.....
1
1
1
1
1
1
1
1
1
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