DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 512

• Manufacturer Part Number: DF2357F20
• Description: IC H8S MCU FLASH 5V 128K 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2357F20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

The BRR setting is found from the following formulas.
Asynchronous mode:
Clocked synchronous mode:
Where B: Bit rate (bit/s)
The bit rate error in asynchronous mode is found from the following formula:
Rev.6.00 Oct.28.2004 page 482 of 1016
REJ09B0138-0600H
N =
N =
Error (%) = {
N: BRR setting for baud rate generator (0 N 255)
ø: Operating frequency (MHz)
n: Baud rate generator input clock (n = 0 to 3)
(See the table below for the relation between n and the clock.)
64
8
2
2
2n–1
ø
ø
2n–1
(N + 1) B 64 2
B
B
ø
10
10
6
6
n
0
1
2
3
10
– 1
– 1
6
2n–1
Clock
ø
ø/4
ø/16
ø/64
– 1
CKS1
0
0
1
1
100
SMR Setting
CKS0
0
1
0
1