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300 SA-1110 Developer’s Manual
Peripheral Control Module
11.9.6 GPCLK Register Locations
Table 11-16 shows the registers associated with the GPCLK and the physical addresses used to
access them.
11.10 Serial Port 2 – Infrared Communications Port (ICP)
The infrared communications port (ICP) operates at half-duplex and provides direct connection to
commercially available Infrared Data Association (IrDA) compliant LED transceivers. The ICP
supports both the original IrDA standard with speeds up to 115.2 Kbps as well as the newer
4-Mbps standard. Both standards use different bit encoding techniques and serial packet formats.
Low-speed IrDA transmission uses the Hewlett-Packard Serial Infrared standard (HP-SIR
*
)forbit
encoding and a universal asynchronous receiver-transmitter (UART) as the serial engine;
high-speed uses four-position pulse modulation (4PPM) and a specialized serial packet protocol
developed expressly for IrDA transmission. To support these two standards, the ICP contains two
separate blocks, each comprised of a bit encoder/decoder and serial-to-parallel data engine. The
engine within the ICP that implements the special 4-Mbps protocol is called the high-speed serial
to parallel (HSSP) receiver-transmitter. Only one of the two standards can be enabled at a time (the
user cannot enable low-speed transmit and high-speed receive at the same time). To support a
variety of IrDA transceivers, both the transmit and receive data pins can be individually configured
0h 8001 001C UTSR0 UART status register 0
0h 8001 0020 UTSR1 UART status register 1
0h 8001 0024 –
0h 8001 005C
— Reserved
Table 11-15. UART Control, Data, and Status Register Locations
Address Name Description
Table 11-16. GPCLK Control Register Locations
Address Name Description
0h 8002 0060 GPCLKR0 GPCLK Control Register 0
0h 8002 0064 GPCLKR1 GPCLK Control Register 1
0h 8002 0068 — Reserved
0h 8002 006C GPCLKR2 GPCLK Control Register 2
0h 8002 0070 GPCLKR3 GPCLK Control Register 3
0h 8002 0074 — Reserved
0h 8002 0078 — Reserved
0h 8002 007C — Reserved
0h 8002 0080 — Reserved
0h 8002 0084 — Reserved
0h 8002 0088 –
0h 8002 FFFF
— Reserved