DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 453

• Manufacturer Part Number: DF71251AD50FPV
• Description: MCU RISC FLASH 32K 8K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Tinyr

Specifications of DF71251AD50FPV

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.3.10 Bit Rate Register (SCBRR)
SCBRR is an 8-bit register that, together with the baud rate generator clock source selected by the
CKS1 and CKS0 bits in the serial mode register (SCSMR), determines the serial transmit/receive
bit rate.
The CPU can always read and write to SCBRR.
The SCBRR setting is calculated as follows:
• Asynchronous mode:
• Clock synchronous mode:
N =
N =
B:
N:
Pφ: Operating frequency for peripheral modules (MHz)
n:
8 × 2
64 × 2
Bit rate (bits/s)
SCBRR setting for baud rate generator (0 ≤ N ≤ 255)
(The setting value should satisfy the electrical characteristics.)
Baud rate generator clock source (n = 0, 1, 2, 3) (for the clock sources and values of
n, see table 12.3.)
Pφ
Pφ
2n-1
2n-1
Initial value:
× B
× B
× 10
R/W:
× 10
Bit:
6
R/W
6
7
1
- 1
- 1
R/W
6
1
R/W
5
1
R/W
4
1
R/W
3
1
R/W
Rev. 5.00 Mar. 06, 2009 Page 433 of 770
2
1
R/W
1
1
R/W
0
1
REJ09B0243-0500