h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 407

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

When changing from smart card interface mode to software standby mode:
When returning to smart card interface mode from software standby mode:
1. Set the data register (DR) and data direction register (DDR) corresponding to the SCK pin
2. Write 0 to the TE bit and RE bit in the serial control register (SCR) to halt transmit/receive
3. Write 0 to the CKE0 bit in SCR to halt the clock.
4. Wait for one serial clock period.
5. Make the transition to the software standby state.
1. Exit the software standby state.
2. Write 1 to the CKE0 bit in SCR and output the clock. Signal generation is started with the
to the value for the fixed output state in software standby mode.
operation. At the same time, set the CKE1 bit to the value for the fixed output state in
software standby mode.
During this interval, clock output is fixed at the specified level, with the duty cycle
preserved.
normal duty cycle.
[1] [2] [3]
Normal operation
Figure 14.32 Clock Halt and Restart Procedure
[4] [5]
Software
standby
Section 14 Serial Communication Interface (SCI)
[6]
Rev. 3.00 Oct 04, 2005 page 367 of 598
[7]
Normal operation
REJ09B0155-0300