參數(shù)資料
型號: M34506M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, MICROCONTROLLER, PDSO20
封裝: 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20
文件頁數(shù): 53/114頁
文件大小: 937K
代理商: M34506M4-XXXFP
Rev.2.00
Aug 28, 2006
page 39 of 119
7643 Group
REJ03B0054-0200
φ
OUT
SYNCOUT
RD
WR
A5
ADL185
DMA
data
ADL2
ADL2, 00
DMA desti-
nation add.
DMA
source add.
PC + 2
ADL1, 00
PC + 1
PCPC + 3
PC + 4
LDA $zzSTA $zz
DMA transferSTA $zz (last 2 cycles)
Data
DMAOUT
(Port P33)
Address
Data
Transfer request
source (“L” active)
Transfer request source
sampling
Reset of transfer request
source sampling
Next instruction
Op code 3
Data
DMA
data
Fig. 31 Timing chart for cycle steal transfer caused by hardware-related transfer request
3C
18
41
90
42, 00
PC + 2
PC + 1
PCPC + 3
PC + 4
LDM #$90, $41
PC + 6
PC + 5
φ
OUT
SYNCOUT
RD
WR
DMAOUT
(Port P33)
Address
Data
Transfer request
source (“L” active)
Transfer request source
sampling
Reset of transfer request
source sampling
Next instruction
1 cycle
instruction
1 cycle
instruction
1 cycle
instruction
DMA transfer
DMA
data
DMA desti-
nation add.
DMA
source add.
Op code 2
DMA
data
Op code 3
Op code 4
Op code 6
Fig. 32 Timing chart for cycle steal transfer caused by software trigger transfer request
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