DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 502

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

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
Rev.7.00 Dec. 24, 2008 Page 448 of 698
REJ09B0074-0700
Figure 12.44 Operation when Switching from SCK Pin Function to Port Pin Function
SCK/port
Data
TE
C/A
CKE1
CKE0
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