參數(shù)資料
型號: UPD784054GCA2-XXX-3B9
廠商: NEC Corp.
英文描述: MICROCONTROLLER|16-BIT|UPD78K4 CPU|CMOS|QFP|80PIN|PLASTIC
中文描述: 單片機| 16位| UPD78K4的CPU |的CMOS | QFP封裝| 80腳|塑料
文件頁數(shù): 40/86頁
文件大?。?/td> 579K
代理商: UPD784054GCA2-XXX-3B9
μ
PD784054(A)
40
8.3 Context Switching
A specific register bank is selected by hardware when an interrupt request is generated or when the BRKCS
instruction is executed.
Execution branches to the vector address stored in advance to the selected register bank, and the current
contents of the program counter (PC) and program status word (PSW) are stacked to the register bank.
The branch destination address must be in a range of 0 to FFFFH.
Figure 8-1. Context Switching Operation When Interrupt Request Is Generated
V
U
T
W
A
B
R5
R7
D
H
X
C
R4
R6
E
L
VP
UP
Register bank n (n = 0 to 7)
< 3 > Select register bank (RBS0 to RBS2
n)
< 4 > RSS
0
IE
0
< 6 > Exchange
< 5 > Save
< 7 > Transfer
< 1 > Save
0000B
< 2 > Save
(bits 8 through
11 of temporary
register)
Temporary register
PSW
PC19-16
PC15_0
Register bank
(0 to 7)
相關(guān)PDF資料
PDF描述
UPD784054GCA-XXX-3B9 MICROCONTROLLER|16-BIT|UPD78K4 CPU|CMOS|QFP|80PIN|PLASTIC
UPD784054GC-XXX-3B9 MICROCONTROLLER|16-BIT|UPD78K4 CPU|CMOS|QFP|80PIN|PLASTIC
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