NEC PD78P214 Manuale Utente
272
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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.
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.
reception of the subsequent command and data.
10.5.4 Control Registers in SBI Mode
(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
register.
register.
The bits of the register have different read/write attributes.
The value of the CSIM register is set to 00H when RESET is input.