参数资料
型号: MB89T635P-SH
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 10 MHz, MICROCONTROLLER, PDIP64
封装: SHRINK, DIP-64
文件页数: 78/153页
文件大小: 7326K
代理商: MB89T635P-SH
HARDWARE CONFIGURATION
2-7
The RP indicates the address of the current register bank and the contents of the RP; the real addresses
are translated as shown in Figure 2.5.
Fig. 2.5 Rule for Translating Real Addresses at General-purpose Register Area
The CCR has bits indicating the results of operations and transfer data contents, and bits controlling the
CPU operation when an interrupt occurs.
H-flag: ...........H-flag is set when a carry or a borrow out of bit 3 into bit 4 is generated as a result of oper-
ations; it is cleared in other cases. This flag is used for decimal-correction instructions.
I-flag: .............An interrupt is enabled when this flag is 1 and is disabled when it is 0. The I-flag is 0 at
reset.
IL1 and IL0: ...These bits indicate the level of the currently-enabled interrupt. The CPU executes interrupt
processing only when an interrupt with a value smaller than the value indicated by this bit is
requested.
N-flag: ...........The N-flag is set when the most significant bit is 1 as a result of operations; it is cleared
when the MSB is 0.
Z-flag:............Z-flag is set when the bit is 0 as a result of operations; it is cleared in other cases.
V-flag: ............V-flag is set when a two's complement overflow occurs as a result of operations; it is reset
when an overflow does not occur.
C-flag: ...........C-flag is set when a carry or a borrow out of bit 7 is generated as a result of operations; it is
cleared in other cases. When the shift instruction is executed, the value of the C-flag is
shifted out.
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