tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 253

• Manufacturer Part Number: tmp88fw45afg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

(Note 3)
Table 21-5 Operating Frequency and Baud Rate in the Serial PROM Mode
1
2
3
4
5
6
7
21.4
Reference Baud Rate (bps)
Baud Rate Modification Da-
Ref. Fre-
14.7456
manner.
modified by transmitting the baud rate modification data shown in Table 21-4 to TMP88FW45AFG. The Table
21-5 shows an operating frequency and baud rate. The frequencies which are not described in Table 21-5 can not be
used.
quency
9.8304
12.288
19.668
(MHz)
12.5
10
12
16
18
20
8
The following shows the UART communication format used in the serial PROM mode.
To perform on-board programming, the communication format of the write controller must also be set in the same
The default baud rate is 9600 bps regardless of operating frequency of the microcontroller. The baud rate can be
Note 1: “Ref. Frequency” and “Rating” show frequencies available in the serial PROM mode. Though the frequency is supported
Note 2: It is recommended that the total frequency difference is within ±3% so that auto detection is performed correctly by the
Note 3: The external controller must transmit the matching data (5AH) repeatedly till the auto detection of baud rate is performed.
Interface Specifications for UART
-
-
-
-
Table 21-4 Baud Rate Modification Data
11.75 to 12.90
11.75 to 12.90
11.75 to 12.90
14.10 to 15.48
15.27 to 16.77
17.62 to 19.35
18.80 to 20.64
18.80 to 20.64
ta
Baud rate (Default): 9600 bps
Data length: 8 bits
Parity addition: None
Stop bit: 1 bit
9.40 to 10.32
9.40 to 10.32
7.64 to 8.39
in the serial PROM mode, the serial PROM mode may not be activated correctly due to the frequency difference in the
external controller (such as personal computer) and oscillator, and load capacitance of communication pins.
reference frequency.
This number indicates the number of times the matching data is transmitted for each frequency.
Baud rate modification data
Rating
(MHz)
Baud rate (bps)
76800
78125
76923
76800
76923
Baud
(bps)
rate
-
-
-
-
-
-
76800
04H
+1.73
+0.16
+1.73
0.00
0.00
(%)
-
-
-
-
-
-
62500
60096
62500
(bps)
-
-
-
-
-
-
-
-
76800
62500
04H
05H
-3.85
0.00
0.00
(%)
-
-
-
-
-
-
-
-
62500
05H
Page 239
57692
59077
60096
57600
(bps)
-
-
-
-
-
-
-
57600
06H
+0.16
+2.56
+4.33
0.00
57600
(%)
06H
-
-
-
-
-
-
-
38462
38400
39063
38400
38462
38400
39063
(bps)
-
-
-
-
38400
38400
07H
07H
+0.16
+1.73
+0.16
+0.16
0.00
0.00
0.00
(%)
-
-
-
-
31250
0AH
31250
31250
32000
30048
31250
30720
31250
(bps)
-
-
-
-
31250
0AH
+2.40
-3.85
-1.70
0.00
0.00
0.00
0.00
19200
(%)
18H
-
-
-
-
19231
19200
19531
18750
19200
19531
19200
19231
20089
19200
19531
TMP88FW45AFG
(bps)
19200
9600
28H
18H
+0.16
+1.73
+1.73
+0.16
+4.63
+1.73
-2.34
0.00
0.00
0.00
0.00
(%)
(bps)
9615
9600
9766
9375
9600
9766
9600
9615
9975
9600
9766
9600
28H
+0.16
+1.73
+1.73
+0.16
+2.34
+1.73
-2.34
0.00
0.00
0.00
0.00
(%)