UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 418

• 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

17.2 Configuration of Serial Interface IIC0
418
Serial interface IIC0 includes the following hardware.
(1) IIC shift register 0 (IIC0)
(2) Slave address register 0 (SVA0)
IIC0 is used to convert 8-bit serial data to 8-bit parallel data and vice versa in synchronization with the serial
clock. IIC0 can be used for both transmission and reception.
The actual transmit and receive operations can be controlled by writing and reading operations to IIC0.
Cancel the wait state and start data transfer by writing data to IIC0 during the wait period.
IIC0 is set by an 8-bit memory manipulation instruction.
Reset signal generation sets IIC0 to 00H.
Cautions 1. Do not write data to IIC0 during data transfer.
This register stores local addresses when in slave mode.
SVA0 is set by an 8-bit memory manipulation instruction.
However, rewriting to this register is prohibited while STD0 = 1 (while the start condition is detected).
Reset signal generation sets SVA0 to 00H.
Note Bit 0 is fixed to 0.
Address: FFA5H
Address: FFA7H
Symbol
Symbol
SVA0
IIC0
2. Write or read IIC0 only during the wait period. Accessing IIC0 in a communication state
Registers
Control registers
other than during the wait period is prohibited. When the device serves as the master,
however, IIC0 can be written only once after the communication trigger bit (STT0) is set to
1.
Item
Figure 17-4. Format of Slave Address Register 0 (SVA0)
7
7
Table 17-1. Configuration of Serial Interface IIC0
Figure 17-3. Format of IIC Shift Register 0 (IIC0)
After reset: 00H
After reset: 00H
CHAPTER 17 SERIAL INTERFACE IIC0
6
6
IIC shift register 0 (IIC0)
Slave address register 0 (SVA0)
IIC control register 0 (IICC0)
IIC status register 0 (IICS0)
IIC flag register 0 (IICF0)
IIC clock selection register 0 (IICCL0)
IIC function expansion register 0 (IICX0)
Port mode register 6 (PM6)
Port register 6 (P6)
User’s Manual U17260EJ6V0UD
5
5
R/W
R/W
4
4
Configuration
3
3
2
2
1
1
0
Note
0
0