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| 型號(hào)： | M37643M8-XXXHP |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件頁(yè)數(shù)： | 29/123頁(yè) |
| 文件大小： | 1292K |
| 代理商： | M37643M8-XXXHP |
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Rev.2.00
Aug 28, 2006
page 11 of 119
7643 Group
REJ03B0054-0200
[CPU Mode Registers A, B (CPUMA, CPUMB)] 000016, 000116
The CPU mode register contains the stack page select bit and the
CPU operating mode select bit and so on.
The CPU mode registers are allocated at address 000016, 000116.
Fig. 8 Structure of CPU mode register
s Notes
Do not use the microprocessor mode in the flash memory version.
CPU mode register B (address 000116)
CPMB
Reserved bit (“0” at read/write)
b0
b7
1 0
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
Fix to “1”.
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
Notes 1: 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.
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