参数资料
型号: MC68HC711EA9CFS2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 2 MHz, MICROCONTROLLER, CQCC52
封装: WINDOWED, CERAMIC, LCC-52
文件页数: 17/58页
文件大小: 583K
代理商: MC68HC711EA9CFS2
MOTOROLA
MC68HC11EA9
24
MC68HC11EA9TS/D
Write $55 to COPRST to arm COP watchdog circuit. Write $AA to COPRST to reset COP watchdog
circuit.
*RBOOT, SMOD, and MDA reset depend on power-up initialization mode and can only be written in
special mode.
RBOOT — Read Bootstrap ROM
SMOD — Special Mode Select
MDA — Mode Select A
IRVNE — Internal Read Visibility/Not E
PSEL[3:0] — Priority Select Bit 4 through Bit 0
Can be written only while the I-bit in the CCR is set (interrupts disabled). These bits select one interrupt
source to be elevated above all other I-bit related sources.
Table 8 COP Timer Rate Selection
Rate
Period Length
CR[1:0]
Selected
E = 1.0 MHz E = 2.0 MHz E = 3.0 MHz
0 0
215
÷ E
32.768 ms
16.384 ms
10.923 ms
0 1
217
÷ E
131.072 ms
65.536 ms
43.691 ms
1 0
219
÷ E
524.288 ms
262.140 ms
174.76 ms
1 1
221
÷ E
2.097 s
1.049 s
699.05 ms
COPRST — Arm/Reset COP Timer Circuitry
$103A
BIT 7
654321
BIT 0
76543210
RESET:
00010000
HPRIO — Highest Priority I-Bit Interrupt and Miscellaneous
$103C
BIT 7
654321
BIT 0
RBOOT*
SMOD*
MDA*
IRVNE
PSEL3
PSEL2
PSEL1
PSEL0
RESET:
00101
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For More Information On This Product,
Go to: www.freescale.com
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