UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 495

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Remark
The main processing of the slave operation is explained next.
Start serial interface IICA and wait until communication is enabled. When communication is enabled, execute
communication by using the communication mode flag and ready flag (processing of the stop condition and
start condition is performed by an interrupt. Here, check the status by using the flags).
The transmission operation is repeated until the master no longer returns ACK. If ACK is not returned from the
master, communication is completed.
For reception, the necessary amount of data is received. When communication is completed, ACK is not
returned as the next data. After that, the master generates a stop condition or restart condition. Exit from the
communication status occurs in this way.
Conform to the specifications of the product that is in communication, regarding the transmission and
reception formats.
No
No
No
IICACTL0
IICACTL0
Clearing communication
IICWL, IICWH
ACKE0 = WTIM0 = 1
SPIE0 = 0, IICE0 = 1
Clearing ready flag
direction flag = 1?
direction flag = 1?
Communication
Ready flag = 1?
Communication
Communication
mode flag = 1?
Communication
Setting IICRSV
IICAF0
mode flag = 1?
SVA0
ACKD0 = 1?
Writing IICA
WREL0 = 1
Setting port
Setting port
mode flag
START
0XXX11XXB
1XX011XXB
Yes
Yes
Yes
Yes
Yes
XXH
No
0XH
Figure 15-32. Slave Operation Flowchart (1)
XXH
CHAPTER 15 SERIAL INTERFACE IICA
Preliminary User’s Manual U19111EJ2V1UD
No
No
Yes
Starts
transmission.
Selects a transfer clock.
Sets a local address.
Sets a start condition.
Setting of the port used alternatively as the pin to be used.
First, set the port to input mode and the output latch to 0 (see 15.3 (9) Port mode register 6 (PM6)).
Set the port from input mode to output mode and enable the output of the I
(see 15.3 (9) Port mode register 6 (PM6)).
No
Clearing ready flag
direction flag = 1?
Communication
Communication
mode flag = 1?
Ready flag = 1?
Reading IICA
WREL0 = 1
Yes
Yes
Yes
No
No
Starts
reception.
2
C bus
495