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H8/3028F Datasheet(PDF) 541 Page - Renesas Technology Corp

Part # H8/3028F
Description  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
PDF  923 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3028F Datasheet(HTML) 541 Page - Renesas Technology Corp

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Rev. 2.00, 09/03, page 511 of 890
• Sample Procedure for Avoiding Low-Level Output: 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.
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
SCK/port
Data
TE
C/
A
CKE1
CKE0
Bit 7
Bit 6
1. End of transmission
3. CKE1= 1
5. CKE1= 0
4. C/
A= 0
2. TE= 0
High-level output TE
Figure 13.24 Operation when Switching from SCK Pin Function to Port Pin Function
(Example of Preventing Low-Level Output)



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