upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 387

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

17.4.3 3-wire serial I/O mode with automatic transmit/receive function
serial operation mode specification register 0 (CSIMA0) is set to 1. After communication is started, only data of the
set number of bytes stored in RAM in advance can be transmitted, and only data of the set number of bytes can be
received and stored in RAM.
are supported.
controller/drivers can be easily realized.
Up to 32 bytes of data can be transmitted/received without using software in the mode in which bit 6 (ATE0) of
In addition, to transmit/receive data continuously, handshake signals (STB0 and BUSY0) generated by hardware
(1) Registers used
• Serial operation mode specification register 0 (CSIMA0)
• Serial status register 0 (CSIS0)
• Serial trigger register 0 (CSIT0)
• Divisor selection register 0 (BRGCA0)
• Automatic data transfer address point specification register 0 (ADTP0)
• Automatic data transfer interval specification register 0 (ADTI0)
• Port mode register 14 (PM14)
• Port register 14 (P14)
The relationship between the register settings and pins is shown below.
Therefore, connection to peripheral LSIs such as OSD (On Screen Display) LSIs and LCD
CHAPTER 17 SERIAL INTERFACE CSIA0
User’s Manual U15947EJ3V1UD
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