Datasheet

Section 16 Serial Communication Interface (SCI, IrDA)
(The H8S/2695 is not equipped with an IrDA function)
Page 800 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
Switching from SCK Pin Function to Port Pin Function
• Problem in Operation: When switching the SCK pin to the output function while DDR and DR
are set to 1 and clock synchronous SCI clock output is being used, low-level output occurs for
one half-cycle, followed by port output.
When switching to the port function by making the following settings while DDR, DR, and
C/A are set to 1 and CKE1, CKE0, and TE are set to 0, low-level output occurs for one half-
cycle.
1. End of serial data transmission
2. TE bit = 0
3. C/A bit = 0 ... switchover to port output
4. Occurrence of low-level output (see figure 16.29)
SCK/port
Data
TE
C/A
CKE1
CKE0
Bit 7Bit 6
1. End of transmission 4. Low-level output
3. C/A = 0
2. TE = 0
Half-cycle low-level output
Figure 16.29 Operation when Switching from SCK Pin Function to Port Pin Function