h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 529

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Switching from SCK Pin Function to Port Pin Function
• Problem in Operation
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 13.27)
SCK/port
Data
TE
C/A
CKE1
CKE0
Figure 13.27 Operation when Switching from SCK Pin Function to Port Pin Function
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.
Bit 6
Bit 7
1. End of transmission
2. TE = 0
Section 13 Serial Communication Interface (SCI)
3. C/A = 0
Rev. 5.00 Sep 22, 2005 page 503 of 1136
4. Low-level output
Half-cycle low-level output
REJ09B0257-0500