HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 513

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Switching from SCK Pin Function to Port Pin Function
Figure 12.27 Operation when Switching from SCK Pin Function to Port Pin Function
Problem in Operation
When switching the SCK pin function to the output port function (high-level output) by
making the following settings while DDR = 1, DR = 1, C/A = 1, CKE1 = 0, CKE0 = 0, and TE
= 1 (synchronous mode), low-level output occurs for one half-cycle.
1. End of serial data transmission
2. TE bit = 0
3. C/A bit = 0
4. Occurrence of low-level output
SCK/port
Data
TE
C/A
CKE1
CKE0
Bit 6
Switchover to port output
Bit 7
1. End of transmission
2. TE = 0
Section 12 Serial Communication Interface (SCI)
3. C/A = 0
Rev.3.00 Mar. 26, 2007 Page 471 of 772
4. Low-level output
Half-cycle low-level output
REJ09B0355-0300