DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 545

• Manufacturer Part Number: DF3048X16V
• Description: MCU 5V 128K,PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

14.3.3
Figure 14.3 shows the data format of the smart card interface. In receive mode, parity is checked
once per frame. If a parity error is detected, an error signal is returned to the transmitting device to
request retransmission. In transmit mode, the error signal is sampled and the same data is
retransmitted if the error signal is low.
The operating sequence is as follows.
1. When not in use, the data line is in the high-impedance state, and is pulled up to the high level
2. To start transmitting a frame of data, the transmitting device transmits a low start bit (Ds),
3. Next, in the smart card interface, the transmitting device returns the data line to the high-
4. The receiving device performs a parity check. If there is no parity error, the receiving device
5. If the transmitting device does not receive an error signal, it proceeds to transmit the next data.
through a resistor.
followed by eight data bits (D0 to D7) and a parity bit (Dp).
impedance state. The data line is pulled up to the high level through a resistor.
waits to receive the next data. If a parity error is present, the receiving device outputs a low
error signal (DE) to request retransmission of the data. After outputting the error signal for a
designated interval, the receiving device returns the signal line to the high-impedance state.
The signal line is pulled back up to the high level through the pull-up resistor.
If it receives an error signal, it returns to step 2 and transmits the same data again.
Data Format
No parity error
Parity error
Ds:
D0 to D7:
Dp:
DE:
Ds
Ds
Start bit
Data bits
Parity bit
Error signal
D0
D0
Figure 14.3 Smart Card Interface Data Format
D1
D1
Output from transmitting device
Output from transmitting device
D2
D2
D3
D3
D4
D4
D5
D5
D6
D6
Rev. 7.00 Sep 21, 2005 page 519 of 878
D7
D7
Section 14 Smart Card Interface
Dp
Dp
Output from
receiving device
DE
REJ09B0259-0700