HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 844

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417751RF240V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-QFP Exposed Pad, 256-eQFP, 256-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

17. Smart Card Interface
(3) Standby Mode and Clock
When switching between smart card interface mode and standby mode, the following procedures
should be used to maintain the clock duty cycle.
Switching from Smart Card Interface Mode to Standby Mode:
1. Set the SBP1IO and SBP1DT bits in SCSPTR1 to the values for the fixed output state in
2. Write 0 to the TE and RE bits in the serial control register (SCSCR1) to stop transmit/receive
3. Write 0 to the CKE0 bit in SCSCR1 to stop the clock.
4. Wait for one serial clock cycle. During this period, the duty cycle is preserved and clock output
5. Write H'00 to the serial mode register (SCSMR1) and smart card mode register (SCSMR1).
6. Make the transition to the standby state.
Returning from Standby Mode to Smart Card Interface Mode:
7. Clear the standby state.
8. Set the CKE1 bit in SCSCR1 to the value for the fixed output state at the start of standby (the
9. Set smart card interface mode and output the clock. Clock signal generation is started with the
Rev.4.00 Oct. 10, 2008 Page 744 of 1122
REJ09B0370-0400
standby mode.
operations. At the same time, set the CKE1 bit to the value for the fixed output state in standby
mode.
is fixed at the specified level.
current SCK pin state).
normal duty cycle.
1 2 3
Normal operation
Figure 17.13 Procedure for Stopping and Restarting the Clock
4
5 6
Standby mode
7
8 9
Normal operation