Z80181 Datasheet, PDF (12/74 Pages) Zilog, Inc. – SMART ACCESS CONTROLLER (SAC™)

Zilog
FUNCTIONAL DESCRIPTION
Z80181
SMART ACCESS CONTROLLER SAC^™
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
each discrete product for a detailed description of each
individual unit. The following subsections describe each
individual functional unit of the SAC.
Timing
Ø
Generator
A18 /TOUT
16-Bit
Programmable
Reload Timers
(2)
TxS
RxS//CTS
CKS
Clocked
Serial I/O
Port
MMU
Bus State Control
CPU
DMACs
(2)
Interrupt
/DREQ1
/TEND
Asynchronous
SCI
(Channel 0)
Asynchronous
SCI
(Channel 1)
TxA0
CKA0 /DREQ0
RxA0
/RTS0
/CTS0
/DCD0
TxA1
CKA1 /TEND0
RxA1
A19-A0
D7-D0
Figure 3. Z181 MPU Block Diagram
2-12
DS971800500