scn68652 NXP Semiconductors, scn68652 Datasheet - Page 22

• Manufacturer Part Number: scn68652
• Description: Multi-protocol Communications Controller Mpcc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TYPICAL APPLICATIONS
1995 May 01
Multi-protocol communications controller (MPCC)
For non-DMA operation TxBE and RxDA are set to the processor which then loads or reads data characters as required.
R/W CONTROLS
ADDRESS PTR
WORD COUNT
R/W CONTROL
CONTROLLER
ADDRESS AND
ADDRESS
DMA
COMPUTER
TERMINAL
CONTROL
SCN2652
OR
WRREQ
RDREQ
TO PROCESSOR
(Continued)
GENERATOR
DATA BUS
BAUD
RATE
TxC
SCN2652
MPCC
RxDA
TxBE
A2–A0
BYTE
R/W
CE
DBEN
RxC TxC RxSI TxSO
No Modem – DC Baseband Transmission
MODEM OR DCE
Figure 19. Typical Applications (cont.)
Figure 20. Typical Applications (cont.)
TxSO
RxC
RxSI
DB15–DB00
SCN2652
SYSTEM ADDRESS AND CONTROL BUS
DMA/PROCESSOR INTERFACE
CHANNEL INTERFACE
RESET
RxSA
RxA
RxE
TxA
TxU
TxE
MM
S/F
LD
LR
LD
LR
8 OR 16 BITS
22
LR
LD
LR
LD
1. INITIALIZES
2. SETS/RESETS
3. RESPONDS
SUPPORT LOGIC:
PROCESSOR (P)
ADDRESS, R/W,
SCN2652
TSOM, TEOM
TO RxSA
DB15–DB00
CONTROL
TxSO
GENERATOR
RxSI
AND
BAUD
RATE
TxC
SCN2652
MPCC
RxC
RxDA
TxBE
SCN2652/SCN68652
COMPUTER
TERMINAL
ADDRESS,
MEMORY
DATA BUS
CE, R/W
OR
SD00075
R/W
SD00074
Product specification