UPD78F1211MC-GAA-AX Renesas Electronics America, UPD78F1211MC-GAA-AX Datasheet - Page 802

• Manufacturer Part Number: UPD78F1211MC-GAA-AX
• Description: MCU 16BIT 78K0R/LX3 38-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Ix3r

Specifications of UPD78F1211MC-GAA-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 27
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 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: -

14.5.15 Cautions
800
(1) When STCEN = 0
(2) When STCEN = 1
(3) If other I
(4) Setting STT and SPT (bits 1 and 0 of IICCTL0) again after they are set and before they are cleared to 0 is
(5) When transmission is reserved, set SPIE (bit 4 of IICCTL0) to 1 so that an interrupt request is generated when
Immediately after I
recognized regardless of the actual bus status. When changing from a mode in which no stop condition has
been detected to a master device communication mode, first generate a stop condition to release the bus, then
perform master device communication.
When using multiple masters, it is not possible to perform master device communication when the bus has not
been released (when a stop condition has not been detected).
Use the following sequence for generating a stop condition.
<1> Set IICA control register 1 (IICCTL1).
<2> Set bit 7 (IICE) of IICA control register 0 (IICCTL0) to 1.
<3> Set bit 0 (SPT) of IICCTL0 to 1.
Immediately after I
regardless of the actual bus status. To generate the first start condition (STT = 1), it is necessary to confirm
that the bus has been released, so as to not disturb other communications.
If I
pin is low and the SCL0 pin is high, the macro of I
start condition). If the value on the bus at this time can be recognized as an extension code, ACK is returned,
but this interferes with other I
<1> Clear bit 4 (SPIE) of IICCTL0 to 0 to disable generation of an interrupt request signal (INTIICA) when the
<2> Set bit 7 (IICE) of IICCTL0 to 1 to enable the operation of I
<3> Wait for detection of the start condition.
<4> Set bit 6 (LREL) of IICCTL0 to 1 before ACK is returned (4 to 80 clocks after setting IICE to 1), to forcibly
prohibited.
the stop condition is detected. Transfer is started when communication data is written to IICA after the interrupt
request is generated. Unless the interrupt is generated when the stop condition is detected, the device stops
in the wait state because the interrupt request is not generated when communication is started. However, it is
not necessary to set SPIE to 1 when MSTS (bit 7 of IICS) is detected by software.
2
C operation is enabled and the device participates in communication already in progress when the SDA0
stop condition is detected.
disable detection.
2
C communications are already in progress
2
2
C operation is enabled (IICE= 1), the bus released status (IICBSY = 0) is recognized
C operation is enabled (IICBSY = 1), the bus communication status (IICBSY = 1) is
2
C communications. To avoid this, start I
CHAPTER 14 SERIAL INTERFACE IICA
User’s Manual U19678EJ1V1UD
2
C recognizes that the SDA0 pin has gone low (detects a
2
C.
2
C in the following sequence.