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參數(shù)資料
| 型號： | UPD7554AGA |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| 中文描述： | 4位單片機 |
| 文件頁數(shù)： | 15/64頁 |
| 文件大?。?/td> | 991K |
| 代理商： | UPD7554AGA |
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15
μ
PD7554A, 7554A(A)
2.
INTERNAL BLOCK FUNCTIONS
2.1
PROGRAM COUNTER (PC): 10 BITS
The program counter is a 10-bit binaryc ounter to retain program memory (ROM) address information.
Fig. 2-1 Program Counter Configuration
PC9
PC8
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PC
When one instruction is executed, usually the program counter is incremented by the number of bytes of the
instruction.
When the call instruction is executed, the PC is loaded with a nkew call address after the stack memory saves
the current contents (return address) of the PC. When the return instruction is executed, the content (return address)
of the stack memory is loaded onto the PC. When the jump instruction is executed, the immediate data identifying
the destination of the jump is loaded to all or some of bits of the PC.
When a skip occurs, the PC is incremented by 2 or 3 during the machine cycle depending on the number of bytes
in the next instruction.
When the RESET signal is input, all the bits of the PC are cleared to zero.
相關PDF資料 |
PDF描述 |
|---|---|
| UPD7554A | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| UPD7554AA | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| UPD7554ACS | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| UPD7554AG | 4-BIT SINGLE-CHIP MICROCOMPUTER |
| UPD75CG08E | 4 BIT SINGLE CHIP CMOS MICROCOMPUTERS |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UPD7566CS044 | 制造商:Panasonic Industrial Company 功能描述:IC |
| UPD75P0016CU | 制造商:Renesas Electronics Corporation 功能描述:MCU 4-Bit 75XL CISC 16KB EPROM 2.5V/3.3V/5V 42-Pin SPDIP |
| UPD75P0016CU-A | 制造商:Renesas Electronics Corporation 功能描述:MCU 4-Bit 75XL CISC 16KB EPROM 2.5V/3.3V/5V 42-Pin SPDIP 制造商:Renesas Electronics 功能描述:75XL 6MHz Cut Tape 制造商:Renesas 功能描述:MCU 4-Bit 75XL CISC 16KB EPROM 2.5V/3.3V/5V 42-Pin SPDIP |
| UPD75P0016GB-3BS-MTX | 制造商:Renesas Electronics 功能描述:MCU 4-Bit 75XL CISC 16KB EPROM 2.5V/3.3V/5V 44-Pin PQFP |
| UPD75P0016GB-3BS-MTX-A | 制造商:Renesas Electronics Corporation 功能描述:MCU 4-bit 75XL CISC 16KB EPROM 2.5V/3.3V/5V 44-Pin PQFP 制造商:Renesas 功能描述:MCU 4-bit 75XL CISC 16KB EPROM 2.5V/3.3V/5V 44-Pin PQFP |
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