UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 314

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

312
Baud Rate
600
1200
2400
4800
9600
19200
31250
38400
76800
115200
(bps)
The transmit/receive clock that is used to generate the baud rate is obtained by dividing the main system
clock.
• Transmit/receive clock generation for baud rate by using main system clock
Remark f
• Error tolerance range for baud rate
The main system clock is divided to generate the transmit/receive clock. The baud rate generated from
the main system clock is determined according to the following formula.
[Baud rate] =
f
n: Value set via TPS00 to TPS02 (0
k: Value set via MDL00 to MDL03 (0
The error for the baud rate depends on the number of bits per frame and the 5-bit counter’s division ratio
[1/(16 + k)].
Figure 16-7 shows an example of the baud rate error tolerance range.
X
: Main system clock oscillation frequency
BRGC0
f
X
7BH
6BH
5BH
4BH
3BH
2BH
1BH
When ASCK0 is selected as the source clock of the 5-bit counter, substitute the input clock frequency
to the ASCK0 pin for f
31H
12H
Table 16-2. Relationship Between Main System Clock and Baud Rate Error
= 8.3886 MHz
X
: Main system clock oscillation frequency
ERR (%)
1.10
1.10
1.10
1.10
1.10
1.10
1.10
1.10
1.3
2
n+1
(k + 16)
f
BRGC0
X
7AH
6AH
5AH
4AH
3AH
2AH
1AH
CHAPTER 16 SERIAL INTERFACE UART0
30H
11H
f
X
X
= 8.000 MHz
in the above expression.
[Hz]
ERR (%)
User’s Manual U14046EJ5V0UD
0.16
0.16
0.16
0.16
0.16
0.16
0.16
2.12
0
n
k
BRGC0
7)
f
2DH
78H
68H
58H
48H
38H
28H
18H
10H
14)
X
= 7.3728 MHz
ERR (%)
1.70
0
0
0
0
0
0
0
0
BRGC0
70H
60H
50H
40H
30H
24H
20H
10H
f
X
= 5.000 MHz
ERR (%)
1.73
1.73
1.73
1.73
1.73
1.73
1.73
0
BRGC0
f
7BH
6BH
5BH
4BH
3BH
2BH
1BH
21H
X
= 4.1943 MHz
ERR (%)
1.14
1.14
1.14
1.14
1.14
1.14
1.14
1.3