HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 797

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

This LSI has an AFE interface that supports softwaremodem. This AFE interface can efficiently
execute the modem processing, because it includes 128 stages of FIFO for each of transmission
and reception. This AFE interface also includes the interface to data access arrangement (DAA)
such as dial pulse generator circuit and ringing detection. Therefore, it is possible to establish a
modem system with a minimum of hardware.
22.1
• Serial interface with FIFO
• Clock synchronized serial interface
• Transmit/receive FIFO size is 16 bits (maximum) × 128 words
• Transmit/receive interrupt threshold size is programmable
• Dial pulse generator circuit is included
• Ringing detection (calling signal) function is included
Figure 22.1 shows a block diagram of AFEIF.
Section 22
Features
AFE_RDET
detector
Ringing
16
AFE_RLYCNT
Figure 22.1
Dial pulse
generator
16
Analog Front End Interface (AFEIF)
Bus I/F
AFE_FS
registers
16
Control
Block Diagram of AFE Interface
16
AFE control word
AFE_SCLK
32
16
16 bits × 128 words
Peripheral bus
AFE_TXOUT
Transmit FIFO
P/S
Section 22
16
Rev. 3.00 Jan. 18, 2008 Page 735 of 1458
AFE status word
HC control
AFE_HC1
16
Analog Front End Interface (AFEIF)
16 bits × 128 words
AFE_RXIN
Receive FIFO
S/P
16
REJ09B0033-0300