UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 447

• 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

SDA0
SCL0
Remark
Communication reservations are accepted via the following timing. After bit 1 (STD0) of IIC status register 0
(IICS0) is set to 1, a communication reservation can be made by setting bit 1 (STT0) of IIC control register 0
(IICC0) to 1 before a stop condition is detected.
Figure 17-22 shows the communication reservation protocol.
SDA0
SPD0
SCL0
STD0
Hardware processing
Program processing
1
IIC0:
STT0:
STD0: Bit 1 of IIC status register 0 (IICS0)
SPD0: Bit 0 of IIC status register 0 (IICS0)
2
Figure 17-21. Timing for Accepting Communication Reservations
3
Bit 1 of IIC control register 0 (IICC0)
IIC shift register 0
STT0 = 1
Communi-
cation
reservation
4
Figure 17-20. Communication Reservation Timing
5
CHAPTER 17 SERIAL INTERFACE IIC0
6
User’s Manual U17260EJ6V0UD
7
Standby mode
Generate by master device with bus mastership
8
9
Set SPD0
and
INTIIC0
Write to
IIC0
Set
STD0
1
2
3
4
5
447
6