Detecting An Address Match; Control Registers In Sbi Mode - NEC PD78212 User Manual

8-bit single-chip microcomputer sub-series

Table of Contents

µ PD78214 Sub-Series

10.5.3 Detecting an Address Match

SBI communication is started when a slave device is selected according to the address sent by the master device.

The software detects whether the address of a slave device matches the sent address. In the wake-up state (WUP

set to 1), the slave device generates a serial transfer completion interrupt request only when it receives the address.

Upon detecting the address match, the software releases the wake-up state (sets WUP to 0) and prepares for the

reception of the subsequent command and data.

(1) Clock synchronous serial interface mode register (CSIM)

This 8-bit register specifies a serial interface operation mode, serial clock, and wake-up function.

Fig. 10-10 shows the format of the CSIM register.

The 8-bit manipulation instruction and bit manipulation instruction can read and write the contents of the

The bits of the register have different read/write attributes.

The value of the CSIM register is set to 00H when RESET is input.