Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 18 3-WIRE VARIABLE-LENGTH SERIAL I/O (CSIF)
R01UH0042EJ0500 Rev.5.00 Page 768 of 1513
Aug 12, 2011
(2) CSIFn transmit data register (CFnTX)
The CFnTX register is a 16-bit buffer register used to write the CSIFn transfer data.
This register can be read or written in 16-bit units.
The transmit operation is started by writing data to the CFnTX register in the transmission 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 CFnTXL register.
Reset sets this register to 0000H.
After reset 0000H R/W Address: CF0TX FFFFFD06H, CF1TX FFFFFD16H,
CF2TX FFFFFD26H, CF3TX FFFFFD36H,
CF4TX FFFFFD46H
CFnTX
(n = 0 to 4)
Remark The communication start conditions are shown below.
Transmission mode (CFnTXE bit = 1, CFnRXE bit = 0): Write to CFnTX register
Transmission/reception mode (CFnTXE bit = 1, CFnRXE bit = 1): Write to CFnTX register
Reception mode (CFnTXE bit = 0, CFnRXE bit = 1): Read from CFnRX register