h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 519

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Restrictions on Use of DTC
When an external clock source is used as the serial clock, the transmit clock should not be
input until at least 5 clock cycles after TDR is updated by the DTC. Misoperation may occur
if the transmit clock is input within 4 clock cycles after TDR is updated. (Figure 15.24)
When RDR is read by the DTC, be sure to set the activation source to the relevant SCI receive-
data-full interrupt (RXI).
SCK
TDRE
Serial data
Note: When operating on an external clock, set t > 4 states.
Figure 15.24 Example of Synchronous Transmission by DTC
t
LSB
D0
D1
D2
Section 15 Serial Communication Interface (SCI, IrDA)
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Rev. 3.00 Jan 18, 2006 page 491 of 1044
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REJ09B0280-0300
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