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參數(shù)資料
| 型號(hào)： | UPD17242UC-XXX-5A4 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4.5 MHz, MICROCONTROLLER, PDSO30 |
| 封裝： | 0.300 INCH, PLASTIC, SSOP-30 |
| 文件頁(yè)數(shù)： | 75/102頁(yè) |
| 文件大?。?/td> | 953K |
| 代理商： | UPD17242UC-XXX-5A4 |
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Data Sheet U15002EJ1V1DS
PD17240, 17241, 17242, 17243, 17244, 17245, 17246
10.3 Reset by Stack Pointer (with RESET Pin Internally Pulled Down)
When the value of the stack pointer reaches 6H or 7H during program execution, the RESET pin is internally pulled
down, and the program counter is reset to 0 (normally, the RESET pin is pulled up).
Therefore, if an interrupt or CALL instruction is executed when the value of the stack pointer is 0 (stack underflow)
or if the stack level exceeds 6 as a result of execution of the RET instruction because the correspondence between
the CALL and RET instructions is not established (stack overflow), the program can be restarted from address 0H.
Table 10-1. Status of Each Hardware After Reset
Hardware
RESET Input in
RESET Input
Standby Mode
During Operation
Program counter (PC)
0000H
Ports
Input/output
Input
Output latch
0
Data memory (RAM)
General-purpose data memory
Retains previous
Undefined
(Except DBF, port register)
status
DBF
0320H
System register (SYSREG)
0
WR
Retains previous
Undefined
status
Control registers
Refer to Figure 12-1 Register Files
8-bit timer
Counter (TMC)
00H
Modulo register (TMM)
FFH
Remote controller carrier
NRZ high-level timer modulo register (NRZHTMM)
Retains previous
Undefined
generator
NRZ low-level timer modulo register (NRZLTMM)
status
Basic interval timer/watchdog timer counter
00H
相關(guān)PDF資料 |
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| UPD17244MC-XXX-5A4 | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17245 | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
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