HD6473937RXV Renesas Electronics America, HD6473937RXV Datasheet - Page 315

• Manufacturer Part Number: HD6473937RXV
• Description: MCU 3/5V 60K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300L SLPr

Specifications of HD6473937RXV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 59
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

4. Multiprocessor Communication Function
The multiprocessor communication function enables data to be exchanged among a number of
processors on a shared communication line. Serial data communication is performed in
asynchronous mode using the multiprocessor format (in which a multiprocessor bit is added to the
transfer data).
In multiprocessor communication, each receiver is assigned its own ID code. The serial
communication cycle consists of two cycles, an ID transmission cycle in which the receiver is
specified, and a data transmission cycle in which the transfer data is sent to the specified receiver.
These two cycles are differentiated by means of the multiprocessor bit, 1 indicating an ID
transmission cycle, and 0, a data transmission cycle.
The sender first sends transfer data with a 1 multiprocessor bit added to the ID code of the receiver
it wants to communicate with, and then sends transfer data with a 0 multiprocessor bit added to the
transmit data. When a receiver receives transfer data with the multiprocessor bit set to 1, it
compares the ID code with its own ID code, and if they are the same, receives the transfer data
sent next. If the ID codes do not match, it skips the transfer data until data with the multiprocessor
bit set to 1 is sent again.
In this way, a number of processors can exchange data among themselves.
Figure 10-18 shows an example of communication between processors using the multiprocessor
format.
301