UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 353

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

(3) Example of setting baud rate
Remark
Baud Rate
115200
153600
312500
625000
19200
24000
31250
38400
48000
76800
[bps]
1200
2400
4800
9600
300
600
Cautions 1. Keep the baud rate error during transmission to within the permissible error range at
Example: Frequency of base clock = 10 MHz = 10,000,000 Hz
TPS63n to TPS60n: Bits 3 to 0 of clock selection register 6n (CKSR6n) (setting of base clock
k:
f
ERR:
n = 0, 1
PRS
TPS63n,
TPS60n
7H
6H
5H
4H
3H
2H
1H
3H
4H
0H
2H
0H
1H
1H
0H
0H
:
2. Make sure that the baud rate error during reception satisfies the range shown in (4)
Set value of MDL67n to MDL60n bits of BRGC6 register = 00100001B (k = 33)
Target baud rate = 153600 bps
Baud rate = 10 M/(2 × 33)
Error = (151515/153600 − 1) × 100
the reception destination.
Permissible baud rate range during reception.
f
PRS
65
65
65
65
65
65
65
13
65
13
33
11
= −1.357 [%]
k
5
8
8
4
CHAPTER 14 SERIAL INTERFACES UART60 AND UART61
= 5.0 MHz
Calculated
113636
156250
312500
625000
= 10000000/(2 × 33) = 151,515 [bps]
19231
24038
31250
38462
48077
75758
Value
1202
2404
4808
9615
301
601
Table 14-4. Set Data of Baud Rate Generator
Value set by MDL67n to MDL60n bits of baud rate generator control
(f
register 6n (BRGC6n) (k = 4, 5, 6, ..., 255)
Peripheral hardware clock frequency
Baud rate error
XCLK6
−1.36
−1.36
ERR
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
1.73
[%]
0
0
0
))
User’s Manual U17554EJ4V0UD
TPS63n,
TPS60n
8H
7H
6H
5H
4H
3H
2H
4H
5H
1H
3H
0H
0H
0H
1H
1H
f
PRS
65
65
65
65
65
65
65
13
65
13
65
43
33
5
8
4
k
= 10.0 MHz
Calculated
116279
151515
312500
625000
19231
24038
31250
38462
48077
76923
Value
1202
2404
4808
9615
301
601
−1.36
ERR
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.94
[%]
0
0
0
TPS63n,
TPS60n
9H
8H
7H
6H
5H
4H
3H
5H
6H
2H
4H
1H
0H
1H
2H
2H
f
PRS
65
65
65
65
65
65
65
13
65
13
65
87
33
k
5
8
4
= 20.0 MHz
Calculated
114943
151515
312500
625000
19231
24038
31250
38462
48077
76923
Value
1202
2404
4808
9615
301
601
−0.22
−1.36
ERR
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
[%]
0
0
0
353