參數資料
型號: SCN68652AC2A44
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: Multi-protocol communications controller MPCC
中文描述: 1 CHANNEL(S), 2M bps, MULTI PROTOCOL CONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數: 22/28頁
文件大?。?/td> 651K
代理商: SCN68652AC2A44
Philips Semiconductors
Product specification
SCN2652/SCN68652
Multi-protocol communications controller (MPCC)
1995 May 01
22
TYPICAL APPLICATIONS
(Continued)
DMA/PROCESSOR INTERFACE
For non-DMA operation TxBE and RxDA are set to the processor which then loads or reads data characters as required.
DMA
CONTROLLER
WORD COUNT
ADDRESS PTR
R/W CONTROL
RDREQ
ADDRESS
R/W CONTROLS
SCN2652
ADDRESS AND
CONTROL
SCN2652
RxA
WRREQ
TO PROCESSOR
RxDA
DB15–DB00
TxBE
A2–A0
BYTE
R/W
CE
DBEN
RxC TxC RxSI TxSO
MODEM OR DCE
DATA BUS
SYSTEM ADDRESS AND CONTROL BUS
PROCESSOR (P)
AND
SUPPORT LOGIC:
1.
INITIALIZES
SCN2652
2.
SETS/RESETS
TSOM, TEOM
3.
RESPONDS
TO RxSA
DB15–DB00
ADDRESS, R/W,
CONTROL
RxE
RxSA
TxA
TxE
TxU
S/F
RESET
MM
RxDA
TxBE
8 OR 16 BITS
R/W
MEMORY
DATA BUS
ADDRESS,
CE, R/W
SD00074
Figure 19. Typical Applications (cont.)
CHANNEL INTERFACE
COMPUTER
OR
TERMINAL
LR
MPCC
SCN2652
TxC
BAUD
RATE
GENERATOR
RxC
LD
LD
LR
LR
LD
LD
LR
TxSO
RxSI
MPCC
SCN2652
TxC
BAUD
RATE
GENERATOR
RxC
TxSO
RxSI
COMPUTER
OR
TERMINAL
No Modem – DC Baseband Transmission
SD00075
Figure 20. Typical Applications (cont.)
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