UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 443

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

17.5.11 Extension code
(1) When the higher 4 bits of the receive address are either “0000” or “1111”, the extension code reception flag
(2) If “11110××0” is set to SVA0 by a 10-bit address transfer and “11110××0” is transferred from the master device,
(3) Since the processing after the interrupt request occurs differs according to the data that follows the extension
(EXC0) is set to 1 for extension code reception and an interrupt request (INTIIC0) is issued at the falling edge
of the eighth clock. The local address stored in slave address register 0 (SVA0) is not affected.
the results are as follows. Note that INTIIC0 occurs at the falling edge of the eighth clock.
• Higher four bits of data match: EXC0 = 1
• Seven bits of data match:
Remark
code, such processing is performed by software.
If the extension code is received while a slave device is operating, then the slave device is participating in
communication even if its address does not match.
For example, after the extension code is received, if you do not wish to operate the target device as a slave
device, set bit 6 (LREL0) of the IIC control register 0 (IICC0) to 1 to set the standby mode for the next
communication operation.
Slave Address
1 1 1 1 0 X X
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 1
0 0 0 0 0 1 0
EXC0: Bit 5 of IIC status register 0 (IICS0)
COI0: Bit 4 of IIC status register 0 (IICS0)
Table 17-4. Extension Code Bit Definitions
R/W Bit
CHAPTER 17 SERIAL INTERFACE IIC0
0
1
×
×
×
COI0 = 1
User’s Manual U17260EJ6V0UD
General call address
Start byte
C-BUS address
Address that is reserved for different bus format
10-bit slave address specification
Description
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