Siemens MC55 User Manual download pdf (Page 20)

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compatible with the COM17045 module, but works in either COM17045 or GPRS6055 mode.

Note the default direction of the 16 digital I/O bits is that bits 0 - 7 are outputs and 8 - 15 are

inputs. If you are in GPRS6055 mode and you change the default direction registers, then this

Digital I/O – Write

GSM BASE + 400h

GPRS6055 or COM17045 Modes

Bit 0 Output 0 CN8 Pin 2

Bit 1 Output 1 CN8 Pin 3

Bit 2 Output 2 CN8 Pin 4

Bit 3 Output 3 CN8 Pin 5

Bit 4 Output 4 CN8 Pin 6

Bit 5 Output 5 CN8 Pin 7

Bit 6 Output 6 CN8 Pin 8

Bit 7 Output 7 CN8 Pin 9

Digital I/O – Read

GSM BASE + 400h

GPRS6055 or COM17045 Modes

Bit 0 Input 0 CN8 Pin 12

Bit 1 Input 1 CN8 Pin 13

Bit 2 Input 2 CN8 Pin 14

Bit 3 Input 3 CN8 Pin 15

Bit 4 Input 4 CN8 Pin 16

Bit 5 Input 5 CN8 Pin 17

Bit 6 Input 6 CN8 Pin 18

Bit 7 Input 7 CN8 Pin 19

Advanced Digital I/O – R/W at GSM BASE + 400h

These addresses are used to interface to the digital I/O port in GPRS6055 mode. These are the

same digital I/O as above, but with enhanced capability. The 16 bits each have a direction bit. If

the direction bit is set to output, a value written to the data bit is provided on the connector. A

read will result in the value on the connector pin (i.e. the output value). If the direction is set to

input, a value written to the data bit is ignored and a read will result in the value on the connector

pin.

Digital I/O Data – Write/Read

GSM BASE + 404h

GPRS6055 Mode Only (Reset = 00h)

Bit 0 I/O 0 CN8 Pin 2

Bit 1 I/O 1 CN8 Pin 3

Bit 2 I/O 2 CN8 Pin 4

Bit 3 I/O 3 CN8 Pin 5

Bit 4 I/O 4 CN8 Pin 6

Bit 5 I/O 5 CN8 Pin 7

Bit 6 I/O 6 CN8 Pin 8

Bit 7 I/O 7 CN8 Pin 9

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 30 31

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