Datasheet

Table Of Contents
Section 13 Serial Communication Interface
REJ09B0140-0900 Rev. 9.00 Page 469 of 846
Sep 16, 2010
H8S/2215 Group
13.10.6 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.
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 13.44)
Bit 7Bit 6
1. End of transmission 4. Low-level output
3. C/A = 0
2. TE = 0
Half-cycle low-level output
SCK/port
Data
TE
C/A
CKE1
CKE0
Figure 13.44 Operation when Switching from SCK Pin Function to Port Pin Function