参数资料
型号: M37641F8FP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP80
封装: 14 X 20 MM, 0.80 MM, PLASTIC, QFP-80
文件页数: 116/140页
文件大小: 1694K
代理商: M37641F8FP
7641 Group
Rev.4.00
Aug 28, 2006
page 75 of 135
REJ03B0191-0400
Fig. 70 Structure of CPU mode register A
CPU mode register A (address 000016)
CPMA
Processor mode bits
b1b0
0 0: Single-chip mode
0 1: Memory expansion mode
1 0: Microprocessor mode (Note 1)
1 1: Not available
Stack page select bit
0: Page 0
1: Page 1
Fix to “1”.
Sub-clock (XCIN-XCOUT) control bit
0: Stopped
1: Oscillating
Main clock (XIN-XOUT) control bit
0: Oscillating
1: Stopped
Internal system clock select bit (Note 2)
0: External clock (XIN-XOUT or XCIN-XCOUT)
1: fSYN
External clock select bit
0: XIN-XOUT
1: XCIN-XCOUT
b0
b7
1
Notes1: This is not available in the flash memory version.
2: When (CPMA 6, 7) = (0, 0), the internal system clock can be selected
between f(XIN) or f(XIN)/2 by CCR7.
The internal clock
φ is the internal system clock divided by 2.
CPU mode register B (address 000116)
CPMB
Slow memory wait select bits
b1b0
0 0: No wait
0 1: One-time wait
1 0: Two-time wait
1 1: Three-time wait
Slow memory wait mode select bits
b3b2
0 0: Software wait
0 1: Not available
1 0: RDY wait
1 1: Software wait plus RDY input anytime wait
Expanded data memory access bit
0: EDMA output disabled
1: EDMA output enabled
HOLD function enable bit
0: HOLD function disabled
1: HOLD function enabled
Resereved bit (“0” at read/write)
Fix to “1”.
b0
b7
1 0
Fig. 71 Structure of CPU mode register B
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