M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 603

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(1) CSIBn receive data register (CBnRX)
(2) CSIBn transmit data register (CBnTX)
The CBnRX register is a 16-bit buffer register that holds receive data.
This register is read-only, in 16-bit units.
The receive operation is started by reading the CBnRX register in the reception enabled status.
If the transfer data length is 8 bits, the lower 8 bits of this register are read-only in 8-bit units as the CBnRXL
register.
Reset sets this register to 0000H.
In addition to reset, the CBnRX register can be initialized by clearing (to 0) the CBnCTL0.CBnPWR bit.
The CBnTX register is a 16-bit buffer register used to write the CSIBn transfer data.
This register can be read or written in 16-bit units.
The transmit operation is started by writing data to the CBnTX register in the transmission enabled status.
If the transfer data length is 8 bits, the lower 8 bits of this register can be read or written in 8-bit units as the
CBnTXL register.
Reset sets this register to 0000H.
Remark
(n = 0, 1)
(n = 0, 1)
CBnRX
CBnTX
The communication start conditions are shown below.
Transmission mode (CBnTXE bit = 1, CBnRXE bit = 0):
Transmission/reception mode (CBnTXE bit = 1, CBnRXE bit = 1): Write to CBnTX register
Reception mode (CBnTXE bit = 0, CBnRXE bit = 1):
After reset: 0000H
After reset: 0000H
CHAPTER 15 CLOCKED SERIAL INTERFACE B (CSIB)
R
R/W
Address: CB0RX FFFFFD04H, CB0RXL FFFFFD04H
User’s Manual U16543EJ4V0UD
Address: CB0TX FFFFFD06H, CB0TXL FFFFFD06H
CB1RX FFFFFD14H, CB1RXL FFFFFD14H
CB1TX FFFFFD16H, CB1TXL FFFFFD16H
Write to CBnTX register
Read from CBnRX register
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