參數(shù)資料
型號: μPD70F3003
廠商: NEC Corp.
英文描述: 16/32 Bit Single Chip Microcontrollers(16/32 位單片微控制器)
中文描述: 16/32位單片機微控制器(16/32位單片微控制器)
文件頁數(shù): 113/141頁
文件大?。?/td> 374K
代理商: ΜPD70F3003
CHAPTER 7 RESET
When a low-level signal is input to the RESET pin, the system is reset, and each on-chip hardware is initialized.
7.1 Initializing
When a low-level signal is input to the RESET pin, the system is reset, and each hardware register is set in the
status shown in Table 7-1. When the RESET signal goes high, program execution begins. If necessary, re-initialize
the contents of each register by program control.
Table 7-1. Register Status after Reset
Hardware (symbol)
Status after Reset
Program counter
PC
00000000H
Interrupt status saving register
EIPC
EIPSW
Undefined
Undefined
NMI status saving register
FEPC
FEPSW
Undefined
Undefined
Exception cause register (ECR)
FECC
EICC
0000H
0000H
Program status word
PSW
00000020H
General register
r0
r1 - r31
Fixed to 00000000H
Undefined
7.2 Starting Up
All devices in the V850 family begin program execution from address 00000000H after it has been reset. After
reset, no immediate interrupt requests are accepted. To enable interrupts, clear the ID bit of the program status word
(PSW) to 0.
101
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