UPD78F0500AMC-CAB-AX Renesas Electronics America, UPD78F0500AMC-CAB-AX Datasheet - Page 583

• Manufacturer Part Number: UPD78F0500AMC-CAB-AX
• Description: MCU 8BIT 30SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0500AMC-CAB-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
(2) When communication reservation function is disabled (bit 0 (IICRSV) of IIC flag register 0 (IICF0) = 1)
(Communication reservation)
Note The communication reservation operation executes a write to IIC shift register 0 (IIC0) when a stop condition
Remark
When bit 1 (STT0) of IIC control register 0 (IICC0) is set to 1 when the bus is not used in a communication during
bus communication, this request is rejected and a start condition is not generated. The following two statuses are
included in the status where bus is not used.
• When arbitration results in neither master nor slave operation
• When an extension code is received and slave operation is disabled (ACK is not returned and the bus was
To confirm whether the start condition was generated or request was rejected, check STCF flag (bit 7 of IICF0).
The time shown in Table 18-7 is required until STCF flag is set to 1 after setting STT0 = 1. Therefore, secure the
time by software.
released when bit 6 (LREL0) of IICC0 register was set to 1)
interrupt request occurs.
STT0:
MSTS0: Bit 7 of IIC status register 0 (IICS0)
IIC0:
Bit 1 of IIC control register 0 (IICC0)
IIC shift register 0
Yes
Note
Figure 18-22. Communication Reservation Protocol
Cancel communication
reservation
Define communication
reservation
MOV IIC0, #
MSTS0 = 0?
SET1 STT0
Wait
DI
EI
(Generate start condition)
No
H
Sets STT0 flag (communication reservation)
Defines that communication reservation is in effect
(defines and sets user flag to any part of RAM)
Secures wait period set by software (see Table 18-6).
Confirmation of communication reservation
Clear user flag
IIC0 write operation
CHAPTER 18 SERIAL INTERFACE IIC0
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