HD6473032F16 Datasheet, PDF (522/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 13 Serial Communication Interface
Switching SCK Pin to Port Output Pin Function in Synchronous Mode: When the SCK pin is
used as the serial clock output in synchronous mode, and is then switched to its output port
function at the end of transmission, a low level may be output for one half-cycle. Half-cycle low-
level output occurs when SCK is switched to its port function with the following settings when
DDR = 1, DR = 1, C/A = 1, CKE1 = 0, CKE0 = 0, and TE = 1.
1. End of serial data transmission
2. TE bit = 0
3. C/A bit = 0 ... switchover to port outpu
4. Occurrence of low-level output (see figure 13.23)
Half-cycle low-level output
SCK/port
Data
Bit 6
TE
C/A
1. End of transmission
Bit 7
2. TE = 0
4. Low-level output
3. C/A = 0
CKE1
CKE0
Figure 13.23 Operation when Switching from SCK Pin Function to Port Pin Function
Rev. 3.00 Mar 21, 2006 page 492 of 814
REJ09B0302-0300