HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 506

• Manufacturer Part Number: HD6433045
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

Restrictions on Usage of DMAC
To have the DMAC read RDR, be sure to select the SCI receive-data-full interrupt (RXI) as the
activation source with bits DTS2 to DTS0 in DTCR.
Restrictions on Usage of the Serial Clock
When transmitting data using the serial clock as an external clock, after clearing SSR of TDRE,
maintain the space between each frame of the lead of the transmission clock (start-up edge) at five
states or more (see Figure 13-22). This condition is also needed for continuous transmission. If it
is not fulfilled, operational error will occur.
SCK
TDRE
TXD
Note: *
Ensure that t
t*
X0
5 states.
Figure 13-22 Serial Clock Transmission (Example)
X1
X2
X3
X4
495
X5
X6
X7
t*
Y0
Continuous transmission
Y1
Y2
Y3