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Section 21 IEBus
TM
Controller
R01UH0134EJ0400 Rev. 4.00 Page 1101 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Table 21.6 Functions of Each Block
Block Function
Internal bus interface Internal bus interface
Data width: 8 bits
Register access
IEBus interface Interface conforms to IEBus specifications
Outputs data from transmit controller to IEBus in IEBus
specification bit format
Picks out frame data in IEBus specification bit format to transfer
to receive controller
Register Control register
Register to control this module
Readable/writable from internal bus
Transmit controller Transmits data in transmit buffer to IEBus
Generates transmit frame combining header information in
register and data in transmit buffer to transmits
Detects transmit error
Receive controller Stores data from IEBus in receive buffer
Stores header information and data in received frame in register
and receive buffer, respectively
Detects receive error
Transmit data buffer Buffer for data transmission
Buffer that stores data to be transmitted to IEBus
Buffer size: 128 bytes
Receive data buffer Buffer for data reception
Buffer that stores data received from IEBus
Buffer size: 128 bytes
21.2 Input/Output Pins
Table 21.7 Pin Configuration
Name Abbreviation I/O Function
IEBus receive data pin IERxD Input Receive data input pin
IEBus transmit data pin IETxD Output Transmit data output pin