ia186es Innovasic Semiconductor Inc., ia186es Datasheet - Page 81

• Manufacturer Part Number: ia186es
• Description: 8-bit/16-bit Microcontrollers
• Manufacturer: Innovasic Semiconductor Inc.

IA186ES/IA188ES
8-Bit/16-Bit Microcontrollers
Table 37. Baud Rates
The value of the SP0BAUD and SP1BAUD registers at reset is 0000h (see Table 38).
Table 38. Serial Port Baud Rate Divisor Registers
5.1.23 SP0RD (086h) and SP1RD (016h)
Serial Port Receive Registers. Data received over the serial ports are stored in these registers
until read. The data are received initially by the receive shift register (no software access)
permitting data to be received while the previous data are being read.
The status of these registers is indicated by the RDR bit (Receive Data Ready) in the serial port
status registers. Setting the RDR bit to 1 indicates that there is valid data in the receive register.
The RDR bit is cleared automatically when the receive register is read.
Baud Rate
300
600
1050
1200
1800
2400
4800
7200
9600
19200
28800
38400
56000
57600
76800
115200
128000
153600
Special
187500
15
14
Bits [15–0]—BAUDDIV Baud Rate Divisor → Defines the divisor for the internal
processor clock.
13
20 MHz
15 MHz
4166
2083
1190
1041
694
520
260
173
130
12
Divisor Based on CPU Clock Rate
65
43
33
22
22
16
10
9
8
5
11
®
25 MHz
21 MHz
5208
2604
1488
1302
868
651
325
217
162
10
81
54
40
28
27
20
13
12
10
7
BAUDDIV
9
33 MHz
24 MHz
8
6875
3437
1964
1718
1145
859
429
286
214
107
71
53
36
35
26
18
16
13
8
7
UNCONTROLLED WHEN PRINTED OR COPIED
6
40 MHz
30 MHz
8333
4166
2380
2083
1388
1041
5
520
347
260
130
86
65
45
43
32
22
19
16
10
Page 81 of 154
IA211050902-15
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December 24, 2008
http://www.Innovasic.com
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