HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 20

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

1.4
Rev. 0, 07/98, page 4 of 453
HOLDA/BUSACK
HOLD/BUSREQ
WR R/W
BHE/HDS
A to A
D to D
RD/N.C.
A /LDS
1
RESET
0
BUSY
0
CPU0
CPU1
WAIT
/
Block Diagram
INTA
BEO
CLK
INT
CS
AS
23
15
generator
troller
Inter-
inter-
Arbi-
troller
face
rupt
con-
Wait
Bus
Bus
con-
ter
Clock
Figure 1.1 Block Diagram of SCA
DMAC (direct
(4 channels)
controller)
memory
access
Timers
Internal bus
: Internal clock (synchronized with CLK in
CPU modes 1, 2, and 3; inverted CLK in
mode 0)
communication
communication
(multiprotocol
(multiprotocol
[channel 1]
[channel 0]
interface)
interface)
MSCI
MSCI
serial
serial
SYNC0
TXD0
RXD0
TXC0
RXC0
RTS0
DCD0
CTS0
SYNC1
TXD1
RXD1
TXC1
RXC1
RTS1
DCD1
CTS1
V
V
CC
SS