z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 157

• Manufacturer Part Number: z80189
• Description: Z80180, Z8s180, Z8l180 Mpu Operation
• Manufacturer: ZiLOG Semiconductor

142
UM005003-0703
PS
0
Prescaler
Z8018x
Family MPU User Manual
Divide
Ratio
f ¸ 10
DR Rate
0
1
Sampling
Rate
16
64
Table 19.
SS2 SS1 SS0 Divide
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Baud Rate
ASCI Baud Rate Selection
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Ratio
¸1
¸1
16
32
64
—
16
32
64
—
2
4
8
2
4
8
General
Divide
Ratio
f ¸ 160
fc ¸ 16
fc ¸ 64
0¸640
10240
10240
20480
40960
1280
2560
5120
1280
2560
5120
320
640
f = 6.144
MHz
38400
19200
Baud Rate (Example)
9600
4800
2400
1200
9600
4800
2400
1200
600
600
300
150
—
—
f = 4.608
MHz
(BPS)
—
—
f = 3.072
MHz
19200
9600
4800
2400
1200
4800
2400
1200
600
300
600
300
150
—
75
—
I/O
0
0
I
I
CKA
Clock
Frequency
f ¸ 10
f ¸ 10
160
320
640
160
320
640
20
40
80
20
40
80
fc
fc