參數(shù)資料
型號: Z8S18033PEC
廠商: ZILOG INC
元件分類: 微控制器/微處理器
英文描述: ENHANCED Z180 MICROPROCESSOR
中文描述: 8-BIT, MICROPROCESSOR, PDIP64
封裝: PLASTIC, DIP-64
文件頁數(shù): 57/70頁
文件大?。?/td> 387K
代理商: Z8S18033PEC
Z80180/Z8S180/Z8L180
Enhanced Z180 Microprocessor
Zilog
DS971800401
P R E L I M I N A R Y
1-57
1
Table 12 shows all DMA transfer mode combinations of
DM0, DM1, SM0, and SM1. Since I/O to/from I/O transfers
are not implemented, 12 combinations are available.
MMOD: Memory Mode Channel 0 (bit).
When channel 0
is configured for memory to/from memory transfers there is
no Request Handshake signal to control the transfer tim-
ing. Instead, two automatic transfer timing modes are se-
lectable: burst (MMOD = 1) and cycle steal (MMOD = 0).
For burst memory to/from memory transfers, the DMAC
takes control of the bus continuously until the DMA transfer
completes (as shown by the byte count register = 0). In cy-
cle steal mode, the CPU is given a cycle for each DMA
byte transfer cycle until the transfer is completed.
For channel 0 DMA with I/O source or destination, the se-
lected Request signal times the transfer and thus MMOD
is ignored. MMOD is cleared to 0 during RESET.
Table 12. Transfer Mode Combinations
Address
DM1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Note:
* Includes memory mapped I/O.
DM0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
SM1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
SM0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
Transfer Mode
Memory
Memory
Memory
Memory
Memory*
Memory
I/O
Memory
Memory
Memory
Memory
Memory
Memory*
Memory
I/O
Memory
Memory
Memory*
Memory
Memory*
Reserved
Reserved
Memory
I/O
Memory I/O
Reserved
Reserved
Increment/Decrement
SAR0+1, DAR0+1
SAR0–1, DAR0+1
SAR0 fixed, DAR0+1
SAR0 fixed, DAR0+1
SAR0+1, DAR0–1
SAR0–1, DAR0–1
SAR0 fixed, DAR0–1
SAR0 fixed, DAR0–1
SAR0+1, DAR0 fixed
SAR0–1, DAR0 fixed
SAR0+1, DAR0 fixed
SAR0–1, DAR0 fixed
相關(guān)PDF資料
PDF描述
Z8S18033PSC ENHANCED Z180 MICROPROCESSOR
Z8S18033VEC CONN HDR INVERSE 30POS 5ROW R/A
Z8S18033VSC CONN HDR INVERSE 120POS 5ROW R/A
Z8S180 CAP 0.1UF 100V +80-20% Z5U AXIAL TR-14
Z8S18006FEC CAP 1UF 50V 10% X7R AXIAL TR-14
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