UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 488

• Manufacturer Part Number: UPD78F1144AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1144AGB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

486
(4) IIC flag register 0 (IICF0)
This register sets the operation mode of I
IICF0 can be set by a 1-bit or 8-bit memory manipulation instruction. However, the STCF and IICBSY bits are
read-only.
The IICRSV bit can be used to enable/disable the communication reservation function.
STCEN can be used to set the initial value of the IICBSY bit.
IICRSV and STCEN can be written only when the operation of I
register 0 (IICC0) = 0). When operation is enabled, the IICF0 register can be read.
Reset signal generation clears this register to 00H.
Remark
Condition for clearing (ACKD0 = 0)
• When a stop condition is detected
• At the rising edge of the next byte’s first clock
• Cleared by LREL0 = 1 (exit from communications)
• When IICE0 changes from 1 to 0 (operation stop)
• Reset
Condition for clearing (STD0 = 0)
• When a stop condition is detected
• At the rising edge of the next byte’s first clock
• Cleared by LREL0 = 1 (exit from communications)
• When IICE0 changes from 1 to 0 (operation stop)
• Reset
Condition for clearing (SPD0 = 0)
• At the rising edge of the address transfer byte’s first
• When IICE0 changes from 1 to 0 (operation stop)
• Reset
ACKD0
following address transfer
clock following setting of this bit and detection of a
start condition
SPD0
STD0
0
1
0
1
0
1
LREL0: Bit 6 of IIC control register 0 (IICC0)
IICE0:
Acknowledge was not detected.
Acknowledge was detected.
Start condition was not detected.
Start condition was detected. This indicates that the address transfer period is in effect.
Stop condition was not detected.
Stop condition was detected. The master device’s communication is terminated and the bus is
released.
Figure 12-7. Format of IIC Status Register 0 (IICS0) (3/3)
Bit 7 of IIC control register 0 (IICC0)
CHAPTER 12 SERIAL INTERFACE IIC0
User’s Manual U17854EJ9V0UD
2
C and indicates the status of the I
Detection of acknowledge (ACK)
Detection of start condition
Detection of stop condition
Condition for setting (ACKD0 = 1)
• After the SDA0 line is set to low level at the rising
Condition for setting (STD0 = 1)
• When a start condition is detected
Condition for setting (SPD0 = 1)
• When a stop condition is detected
edge of SCL0’s ninth clock
2
C is disabled (bit 7 (IICE0) of IIC control
2
C bus.