Z80181 Zilog., Z80181 Datasheet - Page 12

• Manufacturer Part Number: Z80181
• Description: SMART ACCESS CONTROLLER (SAC)
• Manufacturer: Zilog.

Zilog
FUNCTIONAL DESCRIPTION
Functionally, the on-chip Z181 MPU, SCC, and CTC are
the same as the discrete devices (Figure 1). Therefore,
refer to the Product Specification/Technical Manual of
2-12
A18 /TOUT
RxS//CTS
CKS
TxS
Ø
Programmable
Reload Timers
Generator
Serial I/O
Clocked
Timing
A19-A0
MMU
16-Bit
Port
(2)
Figure 3. Z181 MPU Block Diagram
D7-D0
Bus State Control
each discrete product for a detailed description of each
individual unit. The following subsections describe each
individual functional unit of the SAC.
Asynchronous
Asynchronous
(Channel 0)
(Channel 1)
DMACs
SCI
SCI
(2)
CPU
/DREQ1
/TEND
RxA0
/RTS0
/CTS0
/DCD0
TxA1
CKA1 /TEND0
RxA1
TxA0
CKA0 /DREQ0
Interrupt
S
MART
A
CCESS
C
DS971800500
ONTROLLER
Z80181
SAC
™