HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 1085

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

(3)
When switching between smart card interface mode and standby mode, in order to retain the clock
duty, the following switching procedure should be used. Step (1) to step (7) of figure 30.10
correspond to the following operation.
• When switching from smart card interface mode to standby mode
• To return from standby mode to smart card interface mode
TDRE
TEND
ERS
A. Write 0 to the TE and RE bits in the serial control register (SCSCR), to stop transmit and
B. Write 0 to the CKE0 bit in SCSCR to stop the clock.
C. Wait for one cycle of the serial clock. During this interval, the duty is retained, and the
D. Make the transition to standby mode.
E. Cancel the standby state.
F. Set the CKE1 bit in the serial control register (SCSCR) to the value of the output-fixed
G. Write 1 to the CKE0 bit in SCSCR to output a clock signal. Clock signal generation begins
Standby Mode Switching
receive operations. At the same time, set the CKE1 bit to the value for the output-fixed
state in standby mode.
clock output is fixed at the specified level.
state at the beginning of standby (the current SIM_CLK pin state).
at normal duty.
Transmission from SCTDR to SCTSR
Ds
D0 D1 D2 D3 D4 D5 D6 D7 DP
nth transmit frame
Figure 30.9
when Smart Card Interface is in Transmit Mode
Retransmit Standby Mode (Clock Stopped)
DE
(1)
(2)
Ds
D0 D1 D2 D3 D4 D5 D6 D7 DP
Retransmit frame
Rev. 3.00 Jan. 18, 2008 Page 1023 of 1458
Section 30
Transmission from SCTDR to SCTSR
(4)
(3)
(DE)
Ds
D0 D1 D2 D3 D4
(n+1)th transmit frame
SIM Card Module (SIM)
REJ09B0033-0300