Z80189 Datasheet, PDF (67/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
PC_WR
PC
Write
phi
PC
IRQ
16550
MIMIC or
PC side
interface
phi
Sync
8
PRELIMINARY
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
W
R
I
T
E
B
U
F
F
E
R
Write
Pointer
16x8
Data Bits
ALU
phi
R
E
A
Sync
D
B
U
F
F
8
E
R
Read
5
Pointer
MPU_RD
MPU Read
(Data)
FCR Reg.
Figure 78. Transmitter FIFO Block Diagram
MPU
IRQ
16550
MIMIC or
PC Side
Interface
DS971890301
67