M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 218

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SERIAL I/O
7.4 Clock asynchronous serial I/O (UART) mode
Fig. 7.4.12 Sleep mode
7–52
7.4.8 Sleep mode
This mode is used to transfer data between the specified microcomputers, which are connected by using
UARTi. The sleep mode is selected by setting the sleep select bit (bit 7 at addresses 30
receiving.
In the sleep mode, receive operation is performed when the MSB (D
bits, D
when the MSB is “0.” (The UARTi receive register’s contents are not transferred to the UARTi receive
buffer register. Additionally, the receive complete flag and error flags do not change and the UARTi receive
interrupt request does not occur.)
The following shows an usage example of sleep mode when the transfer data length is 8 bits.
Transmit data, which has “1” in bit 7 and the address of the slave microcomputer with which communicates
Transmit data, which has “0” in bit 7, from the master microcomputer. (Only the microcomputer specified
Set the same transfer data format for the master and slave microcomputers. Select the sleep mode for
In all slave microcomputers, check in the interrupt routine whether bits 0 to 6 in the receive data match
In the slave microcomputer of which address matches bits 0 to 6 in the receive data, clear the sleep
By repeating step
All slave microcomputers receive data of step
the slave microcomputers.
in bits 0 to 6, from the master microcomputer to all slave microcomputers.
occurs.)
their addresses.
mode. (Do not clear the sleep mode for the other slave microcomputers.)
By performing steps
in steps
communicating with another microcomputer, perform steps
microcomputer.
7
when it is 8 bits, D
Slave A
to
can receive this data. The other microcomputers do not receive this data.)
, transfer can be performed between the same microcomputers continuously. When
6
to
when it is 7 bits) of the receive data is “1.” Receive operation is not performed
Slave B
, “specification of the microcomputer performing transfer” is realized.
7702/7703 Group User’s Manual
Master
Slave C
. (At this time, the UARTi receive interrupt request
Transfer data between the master
microcomputer and one slave microcomputer
selected from multiple slave microcomputers.
to
8
when the transfer data length is 9
in order to specify the new slave
Slave D
16
, 38
16
) to “1” when