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III PERIPHERAL BLOCK: MONITORED MOBILE ACCESS INTERFACES
S1C33210 FUNCTION PART EPSON B-III-10-1
III-10 Monitored Mobile Access Interfaces
Configuration of Mobile Access Interfaces
Features
The C33 peripheral block includes mobile access interfaces with the following features. Used in combination with
the software modem module, they support data communications with PDC, packet PDC, PHS, and CdmaOne
mobile devices.
• There are four configuration choices.
PDC communications mode ARQ frame processing for high-speed communications mode
HDLC communications mode HDLC (packet) frame processing
PHS communications mode PIAFS frame processing for beara transfers at 32 kbps or 64 kbps
UART communications mode UART communications using serial interface Ch. 3
• A serial-to-parallel converter with built-in buffer for communications data and CRC generator/checker handles
data conversion, data transfers, and synchronization detection for the interfaces.
• The interfaces share I/O pins, whose configuration is switched between communications modes.
• The built-in data buffer uses asynchronous dual-port RAM (1R/1W type) with a capacity of 96 16-bit words.
• The module generates the following eight interrupt requests, mapped according to the communications mode
under program control to five interrupt request lines to the CPU core: PDC interrupt, HDLC receive interrupt,
HDLC transmit interrupt, HDLC Sp interrupt, HDLC E/S interrupt, PHS receive interrupt, PHS transmit
interrupt, and modem status change interrupt.
• The module also includes some functions for controlling mobile access interface I/O ports.
Figure 10.1 summarizes the mobile access interface components.
Serial interface Ch. 3
SIN3
SOUT3
Packet processor
(HDLC interface)
PDC processor
(PDC interface)
PIAFS processor
(PHS interface)
Communications
mode switch
Mobile access
interface I/O
Interrupt requests
System control block
Data
buffer
Internal data bus
System control block:
PIAFS processor:
PDC processor:
Packet processor:
Data buffer:
This switches the communications mode, controls I/O ports, etc.
This exchanges PIAFS frames with a PHS device.
This exchanges ARQ frames with a PDC device.
This exchanges HDLC frames with a PDC device supporting packets.
This holds data for frame data transfers.
Figure 10.1 Mobile Access Interface Components