PD72042B_15 Datasheet, PDF (35/92 Pages) Renesas Technology Corp – LSI DEVICE FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL

µPD72042B
Notes 2. When the MSB of the control bits set in MCR is 1 (for master transmission), set the number of bytes
of transmission data, and at least one byte of transmission data in TBF before command setting.
3. When the MSB of the control bits set in MCR is 1 (for master transmission), set at least one byte of
transmission data before command setting. This operation is not required if all transmission data has
already been set in TBF.
4. Set the number of bytes of transmission data, and at least one byte of transmission data in TBF before
command setting.
5. Set at least one byte of transmission data in TBF before command setting. This operation is not required
if all transmission data has already been set in TBF.
(2) When bit 7 (MSB) of CMR is 1
An optional function is set.
b7
b6
1
0
b5
b4
b3
b2
b1
b0
0
0
0
IRS MFC DERC CMR
[MFC]: Selection of one frame/multiple frames
1 : Data for multiple frames is stored in RBF.
0 : Data for only one frame is stored in RBF.
[DERC]: Broadcast reception selection
1 : The issue of return code 1100 (broadcast reception error) for SLRC of the RCR register is enabled.
0 : The issue of return code 1100 (broadcast reception error) for SLRC of the RCR register is disabled.
[IRS]: Interrupt generation condition selection
0 : An interrupt is requested when the data of the RCR register changes.
1 : An interrupt is requested when the data of the RCR register changes to other than the following:
MARC = 0000B (start of master transmission)
MARC = 0100B (start of master reception)
SLRC = 0000B (start of slave data transmission)
SLRC = 0100B (start of slave reception)
SLRC = 1000B (start of broadcast reception)
Caution Set an optional function in initialization processing after reset cancellation for the µPD72042B.
Until an optional function has been set, the µPD72042B will not accept IEBus communication.
Data Sheet S13990EJ3V0DS
33