UPD70F3771GF-GAT-AX Renesas Electronics America, UPD70F3771GF-GAT-AX Datasheet - Page 882

• Manufacturer Part Number: UPD70F3771GF-GAT-AX
• Description: MCU 32BIT V850ES/JX3-H 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Hr

Specifications of UPD70F3771GF-GAT-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 48MHz
• Connectivity: CAN, CSI, EBI/EMI, I²C, UART/USART, USB
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

V850ES/JG3-H, V850ES/JH3-H
19.16.3 Slave operation
requiring a significant change of the operation status, such as stop condition detection during communication) is necessary.
the INTIICn interrupt servicing performs only status change processing and that the actual data communication is
performed during the main processing.
these flags to the main processing instead of the INTIICn signal.
(1) Communication mode flag
(2) Ready flag
(3) Communication direction flag
using the communication mode flag and ready flag (the processing of the stop condition and start condition is performed
by interrupts, conditions are confirmed by flags).
device stops returning ACK, transfer is complete.
R01UH0042EJ0400 Rev.4.00
Sep 30, 2010
The following shows the processing procedure of slave operation.
Basically, the operation of the slave device is event-driven. Therefore, processing by an INTIICn interrupt (processing
The following description assumes that data communication does not support extension codes. Also, it is assumed that
Therefore, the following three flags are prepared so that the data transfer processing can be performed by passing
The following shows the operation of the main processing block during slave operation.
I
For transmission, the transmission operation is repeated until the master device stops returning ACK. When the master
2
This flag indicates the following communication statuses.
Clear mode:
Communication mode: Data communication in progress (valid address detection stop condition detection, ACK from
This flag indicates that data communication is enabled. This is the same status as an INTIICn interrupt during normal
data transfer. This flag is set in the interrupt processing block and cleared in the main processing block. The ready
flag for the first data for transmission is not set in the interrupt processing block, so the first data is transmitted without
clear processing (the address match is regarded as a request for the next data).
This flag indicates the direction of communication and is the same as the value of IICSn.TRCn bit.
C0n starts and waits for the communication enable status. When communication is enabled, I
I
2
C
Data communication not in progress
master not detected, address mismatch)
Figure 19-20. Overview of Software During Slave Operation
INTIICn signal
Setting, etc.
Interrupt servicing
Setting, etc.
Data
Flag
Main processing
CHAPTER 19 I
2
C0n performs transfer
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C BUS