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Section 21 IEBus
TM
Controller
R01UH0134EJ0400 Rev. 4.00 Page 1083 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Section 21 IEBus
TM
Controller
This LSI has an on-chip one-channel IEBus controller. The Inter Equipment Bus
TM
(IEBus
TM
)* is a
small-scale digital data transfer system for inter-equipment data transfer.
This LSI does not have an on-chip IEBus driver/receiver, so it is necessary to mount a dedicated
driver/receiver externally. In addition, as the IERxD and IETxD pins need 3V to operate, a
dedicated external level shifter is necessary.
Note: * The Inter Equipment Bus
TM
(IEBus
TM
) is a trademark of Renesas Electronics
Corporation.
21.1 Features
IEBus protocol control (layer 2) supported
Half-duplex asynchronous communications
Multi-master system
Broadcast communications function
Selectable mode (three types) with different transfer speeds
On-chip buffers for data transmission and reception
Transmission and reception buffers: 128 bytes each
Up to 128 bytes of consecutive transmit/reception (maximum number of transfer bytes in
mode 2)
Operating frequency
12 MHz, 12.58 MHz (This module uses 1/2 divided clocks of P, or AUDIO_X1*,
AUDIO_X2*.)
18 MHz, 18.87 MHz (This module uses 1/3 divided clocks of P, or AUDIO_X1*,
AUDIO_X2*.)
24 MHz (This module uses 1/4 divided clocks of P, or AUDIO_X1*, AUDIO_X2*.)
25.16 MHz (This module uses 1/4 divided clocks of P.)
30 MHz, 31.45 MHz (This module uses 1/5 divided clocks of P.)
36 MHz (This module uses 1/6 divided clocks of P.)
Note: * Available as this module clock input only when not used as the clock input for serial
sound interface, serial I/O with FIFO, or Renesas SPDIF interface.
Module standby mode can be set.