h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 530
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 530 of 1165
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Section 13 Serial Communication Interface (SCI)
• Sample Procedure for Avoiding Low-Level Output
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. 5.00 Sep 22, 2005 page 504 of 1136
REJ09B0257-0500
SCK/port
Data
TE
C/A
CKE1
CKE0
Figure 13.28 Operation when Switching from SCK Pin Function to Port Pin Function
As this sample procedure temporarily 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
(Example of Preventing Low-Level Output)
Bit 7
1. End of transmission
2. TE = 0
3. CKE1 = 1
4. C/A = 0
High-level output
5. CKE1 = 0
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