R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 810

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 21 Serial Communication Interface with FIFO (SCIF)
21.3.8
SCBRR is an 8-bit register that set the serial transmission/reception bit rate in accordance with the
baud rate generator operating clock selected by bits CKS1 and CKS0 in SCSMR.
SCBRR can always be read from and written to by the CPU.
The SCBRR setting is found from the following equation.
Asynchronous mode:
Clocked synchronous mode:
Where B:
Table 21.4 SCSMR Settings
The bit rate error in asynchronous mode is found from the following equation:
Rev.1.00 Dec. 13, 2005 Page 758 of 1286
REJ09B0158-0100
n
0
1
2
3
N:
Pck: Peripheral module operating frequency (MHz)
n:
N =
N =
Error (%) =
Bit Rate Register n (SCBRR)
Bit rate (bit/s)
SCBRR setting for baud rate generator (0 ≤ N ≤ 255)
0 to 3
(See table 21.4 for the relation between n and the clock.)
Baud Rate Generator Input Clock
Pck
Pck/4
Pck/16
Pck/64
64 × 2
8 × 2
Pck
Pck
2n - 1
2n - 1
(N + 1) × B × 64 × 2
× B
× B
Pck × 10
× 10
× 10
6
6
6
- 1
- 1
2n - 1
- 1
CKS1
0
0
1
1
× 100
SCSMR Setting
CKS0
0
1
0
1