H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 305

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

12.8.7
When SCK pins are switched to port pins after transmission has completed, pins are enabled for
port output after outputting a low pulse of half a cycle as shown in figure 12.25.
To prevent the low pulse output that is generated when switching the SCK pins to the port pins,
specify the SCK pins for input (pull up the SCK/port pins externally), and follow the procedure
below with DDR = 1, DR = 1, C/A = 1, CKE1 = 0, CKE1 = 0, and TE = 1.
1. End serial data transmission
2. TE bit = 0
3. CKE1 bit = 1
4. C/A bit = 0 (switch to port output)
5. CKE1 bit = 0
Figure 12.26 Prevention of Low Pulse Output at Switching from SCK Pins to Port Pins
Switching from SCK Pins to Port Pins
SCK/Port
Data
TE
C/A
CKE1
CKE0
SCK/Port
Data
TE
C/A
CKE1
CKE0
Figure 12.25 Switching from SCK Pins to Port Pins
Bit 6
Bit 6
Bit 7
Bit 7
1. Transmission end
1. Transmission end
2. TE = 0
2. TE = 0
3. CKE1 = 1
Section 12 Serial Communication Interface (SCI)
3. C/A = 0
Rev. 2.00 Mar 21, 2006 page 267 of 518
4. Low pulse output
Low pulse of half a cycle
4. C/A = 0
High output
5. CKE1 = 0
REJ09B0299-0200