HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 426

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

12. Serial Communication Interface
• Sample Procedure for Avoiding Low-Level Output: As this sample procedure temporarily
1. End of serial data transmission
2. TE bit = 0
3. CKE1 bit = 1
4. C/A bit = 0 ... switchover to port output
5. CKE1 bit = 0
Rev.4.00 Aug. 20, 2007 Page 382 of 638
REJ09B0395-0400
SCK/port
Data
TE
C/A
CKE1
CKE0
Figure 12.24 Operation when Switching from SCK Pin Function to Port Pin Function
places the SCK pin in the input state, the SCK/port pin should be pulled up beforehand with an
external circuit.
With DDR = 1, DR = 1, C/A = 1, CKE1 = 0, CKE0 = 0, and TE = 1, make the following
settings in the order shown.
Bit 6
Bit 7
(Example of Preventing Low-Level Output)
1. End of transmission
2.TE = 0
3.CKE1 = 1
4.C/A = 0
High-level outputTE
5.CKE1 = 0