HD64570F16 Renesas Electronics America, HD64570F16 Datasheet - Page 349

• Manufacturer Part Number: HD64570F16
• Description: IC SCA SRL COMM ADAPTER 88QFP
• Manufacturer: Renesas Electronics America

Specifications of HD64570F16

• Applications: ISDN
• Interface: Serial
• Voltage - Supply: 4.75 V ~ 5.25 V
• Package / Case: 88-QFP
• Mounting Type: Surface Mount
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -20C to 75C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.1.4
Initialization: An example of an initialization program is given below.
CMD fl 21H........................................ Resets channel.
MD0
MD2
CTL
TRC0 fl 1FH........................................ TXRDY bit = 1 when the transmit buffer is not full.
TRC1 fl 1FH........................................ TXRDY bit = 0 when the transmit buffer is full.
fl 87H........................................ Specifies bit synchronous HDLC mode.
fl 00H........................................ Specifies the NRZ code.
fl 11H........................................ Specifies idle pattern transmission.
Transmission in DMA Chained-Block Transfer Mode (Bit Synchronous HDLC
Mode)
Figure 9.4 RXINT Interrupt Processing Routine (using HD64180)
Analyze interrupt source
Read ST1 and ST2
(ACC
Issue EI instruction
Process interrupt
Clear interrupt
(ST2
ST1
source bit
Return
Start
ST1, ST2)
ACC)
ACC,
Specifies CRC-CCITT mode, and presets to all 1s.
Specifies full-duplex mode.
Specifies RTS line high-level output.
ACC:
ST1:
ST2:
Accumulator
Status register 1
Status register 2
Rev. 0, 07/98, page 333 of 453