User's Manual Part 1

Specifications Merlin GPRS PC Card Specifications 23
P/N 90023363 Revision 1.8
Table 7: Radio Power Index
Table 8: PCS Gain Index
Modes
The Merlin GPRS PCS PC Card supports both memory mode and I/O mode.
Memory Mode
When the Merlin GPRS PCS PC Card is inserted into a PC card host, the card will power
up in memory mode. In this mode, the host will read CIS from the attribute memory on the
card and then configure the card for I/O mode and assign the card a COM port. This
process is automatic and transparent to the user.
The Merlin GPRS PCS PC Card does not provide the host with any additional
RAM or FLASH storage.
I/O Mode
Once the GPRS PCS PC Card has been configured and the COM port assigned, the card
will then be in 8-bit I/O mode. The information that the host will read from CIS memory will
indicate that the device is a modem card with a serial port interface containing a UART
type of 16550. The combination of the base addresses and IRQs, in the order that the
modem will accept, are listed below in Table 9: Base Addresses and IRQs.
Table 9: Base Addresses and IRQs
Radio Power Index
Bands Index Power
GSM 900 5-19 33 - 5 dBm
PCS 1900/DCS 1800 0-15 30 - 0 dBm
0 - 25 0 = min gain, 25 = max gain
Base Address IRQ Comment
3F8 4 Only level interrupts are supported
2F8 3 Only level interrupts are supported
3E8 4 Only level interrupts are supported
2E8 3 Only level interrupts are supported
Any base address 7- 0 and 15 - 8 Only level interrupts are supported