Application Note
Differences between GM47/GM48
and GM47r5/GM48r5
First edition (October 2003)
Sony Ericsson Mobile Communications. publishes this manual without making any warranty as to the
content contained herein. Further Sony Ericsson Mobile Communications. reserves the right to make
modifications, additions and deletions to this manual due to typographical errors, inaccurate information,
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nevertheless be incorporated into new editions of this manual.
All rights reserved.
© Sony Ericsson Mobile Communications., 2003
Differences between GM47 and GM47r5
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Contents
1
INTRODUCTION....................................................................................................................4
2 PIN OUT CHANGES GM47/GM48 TO GM47R5/GM48R5................................................... 5
2.1 GM47/GM48 PINOUT ....................................................................................................... 5
2.2 GM47R5/GM48R5 PINOUT ............................................................................................... 6
2.3 BULLET-POINT DIFFERENCES ............................................................................................. 7
3 DETAILED DIFFERENCE DESCRIPTION ........................................................................... 8
3.1 IO# / ADC# (PINS 13, 22)................................................................................................. 8
3.1.1 Backwards compatibility ..........................................................................................8
3.2 RS232 FLOW CONTROL (PINS 32, 36, 37, 38, 39, 40) ....................................................... 8
3.2.1 Backwards compatibility ..........................................................................................8
3.3 LED / IO6 (PIN 33) ........................................................................................................... 9
3.3.1 Backwards compatibility ..........................................................................................9
3.4 IN# / O# (PINS 37 / 32, 36, 38, 40).................................................................................... 9
3.4.1 Backwards compatibility ..........................................................................................9
3.5 UART3 / IO# (PINS 43, 44)............................................................................................... 9
3.5.1 Backwards compatibility ..........................................................................................9
4 SOFTWARE DIFFERENCES .............................................................................................. 10
4.1 AT COMMANDS ............................................................................................................... 10
4.1.1 AT*E2IO................................................................................................................. 10
4.1.2 AT*E2RS232 ......................................................................................................... 10
4.2 INPUT & OUTPUT CROSS REFERENCE .............................................................................. 11
Differences between GM47 and GM47r5
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1 Introduction
This document sets out the differences both in electrical interface and in
software between the existing product, GM47 and the new enhanced
product, the GM47r5
It shows the compatibility between the two products and gives an overview
of the improvements implemented in the new product.
Differences between GM47 and GM47r5
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2 Pin Out Changes GM47/GM48 to GM47r5/GM48r5
2.1 GM47/GM48 Pinout
Default @ PU Pin Signal Name Signal Name Pin Default @ PU
1 VCC DGND 2
3 VCC DGND 4
5 VCC DGND 6
7 VCC DGND 8
9 VCC DGND 10
11 VCC DGND 12
I/P 100K 2V7 13 RESERVED ON/OFF 14
15 SIMVCC SIMPRESENCE 16
17 SIMRST SIMDAT 18
19 SIMCLK DAC 20
I/P 100K 2V7 21 I/O1 I/O2 22 I/P 100K 2V7
I/P 100K 2V7 23 I/O3 I/O4 24 I/P 100K 2V7
25 VRTC ADC1 26
27 ADC2 ADC3 28
29 SDA SCL 30
LO, pulse HI on
sound
31 BUZZER O5 32 HI for 10mS then LO
LO, pulse HI on
LED on
33 LED VIO 34
LO, pulse 100ns
appears 9ms
after VIO
35 TX_ON
RI
O6
36
HI for 350mS then
LO for 350mS then
HI
I/P 100K 2V7 37
DTR
IN5
DCD
O7
38
HI for 350mS then
LO for 350mS then
HI
I/P 100K 2V7 39 RTS CTS 40 Hi 397mS then LO
LO 41 TD RD 42
HI for 640ms then LO
pulse for 13.3ms then
HI
0.7V for 9ms then
LO
43 TD3 RD3 44
HI but with LO pulses
then HI
LO 45 TD2 RD2 46
HI for 9ms then LO
spikes/pulses e.g.
2µs Then HI
47 PCMULD PCMDLD 48
49 PCMO PCMI 50
51 PCMSYN PCMCLK 52
53 MICP MICN 54
55 BEARP BEARN 56
57 AFMS SERVICE 58
59 ATMS AGND 60
PU = Power Up
Differences between GM47 and GM47r5
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2.2 GM47r5/GM48r5 Pinout
Default @ PU Pin Signal Name Signal Name Pin Default @ PU
1 VCC DGND 2
3 VCC DGND 4
5 VCC DGND 6
7 VCC DGND 8
9 VCC DGND 10
VCC – 0.5V 11 CHG_IN DGND 12
200µs rise RC 13
I/O5
ADC4
ON/OFF 14
15 SIMVCC SIMPRESENCE 16
17 SIMRST SIMDAT 18
19 SIMCLK DAC 20
I/P 100K 2V7 21 I/O1
I/O2
ADC5
22 200µs rise RC
I/P 100K 2V7 23 I/O3 I/O4 24 I/P 100K 2V7
25 VRTC ADC1 26
27 ADC2 ADC3 28
29 SDA SCL 30
LO, pulse on
sound
31
BUZZER
O3
DSR
32
HI for 330mS
then
LO
LO, HI on LED
light.
33
LED
I/O6
VIO 34
LO, pulse 1.2µs
appears 1ms
after VIO
35 TX_ON
RI
O2
36
HI for 330mS
then
LO for 260mS
then HI
I/P 100K 2V7 37
DTR
IN1
DCD
O1
38
HI for 330mS
then
LO for 260mS
then HI
I/P 100K 2V7 39
RTS
I/O9
CTS
O4
40
HI for 330mS
then
LO
LO 41 TD RD 42
HI for 90ms then
low pulse for
1µs then HI
0.7V for 1ms
then LO
43
TD3
I/O7
RD3
I/O8
44
HI, LO pulses
then LO
0.7V for 1ms
then LO
45 TD2 RD2 46
HI for 90ms then
low pulse for
1µs then HI
47 PCMULD PCMDLD 48
49 PCMO PCMI 50
51 PCMSYN PCMCLK 52
53 MICP MICN 54
55 BEARP BEARN 56
57 AFMS SERVICE 58
59 ATMS AGND 60
PU = Power Up
Differences between GM47 and GM47r5
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2.3 Bullet-point Differences
Below the main differences in software are listed.
• DSR signal has been implemented sharing with a digital output.
• One new general purpose I/O pin added (dual function, allowing
either digital I/O or analogue ADC).
• Two additional ADC inputs, sharing common pin with digital I/O (total
ADC capability increased to five lines).
• Dual function pins provide 9 digital I/O, 4 digital outputs and 1 digital
input.
Differences between GM47 and GM47r5
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3 Detailed Difference Description
3.1 IO# / ADC# (Pins 13, 22)
To increase analogue input capabilities, the GM47r5 optimises the IO by
multiplexing or sharing different features on single pins. There are two
digital IO pins which now have an additional ADC input. When configured
as digital IO, the software will not read the voltages at the two new ADC
inputs. When configured as ADC inputs the software will configure the
digital IO pins as input or high impedance tri-state. In this state any
applied voltage between 0V and 2.75V can be read as an 8 bit value.
3.1.1 Backwards compatibility
Default operation designation is as an I/O pin set to an input.
This is as GM47.
3.2 RS232 Flow Control (Pins 32, 36, 37, 38, 39, 40)
In order to increase the flexibility and variety of GM47r5 peripherals, the
RS232 hardware flow control shares its physical interface with an
extended general purpose IO capability. Due to the nature of this sharing,
it is not feasible to operate all these features concurrently (although, with
care, dynamic switching from one feature to another and back is possible
but may require additional external circuitry).
When a particular feature is required of an IO, the software sets the states
of the relevant IO blocks disabling one set and enabling others. This is
most noticeable with the RS232 hardware flow control when switching to
the general purpose IO functionality.
If full hardware flow control and handshaking is required there will be no
additional general purpose IO sharing these pins. If intermediate
hardware flow control is selected (RTS and CTS only), the unused flow
control pins (DTR, DCD, RI, DSR) are made available general purpose
outputs.
If RS232 hardware flow control is switched off altogether, the remaining
general purpose IO is enabled.
3.2.1 Backwards compatibility
The only difference is that the RS232 pins that double as Input and Output
pins when addressed in AT*E2IO will now return error when trying to
manipulate them, unless AT*E2RS232 is used to change which RS232
pins are in use. Previously GM47 allowed both IO operations and RS232
functions to occur concurrently.
Differences between GM47 and GM47r5
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Default operation designation is as RS232 interface with full hardware flow
control.
This is as GM47 except pin 32 (DSR/03) was a digital output pin only,
OUT5. The power up default of OUT5 is commensurate with that of DSR
(OUT5; HI for 10mS then LO, DSR/03; HI for 330mS then LO).
3.3 LED / IO6 (Pin 33)
The LED function pin can be used as a general purpose digital IO when
the flashing LED function is not required. However, this pin does not have
an on-board pull-up resistor. It is required that an external pull-up or pulldown resistor be provided by the host circuitry when either not used or
when used as a digital input.
3.3.1 Backwards compatibility
Default operation designation is as LED.
This is as GM47.
3.4 IN# / O# (Pins 37 / 32, 36, 38, 40)
When not being used for an alternative function the pins labelled I# and
O# may be used for general purpose inputs or outputs respectively. The
inputs have an on-board 100k pull-up resistor and the outputs are driven
rail-to-rail at 2.75V levels.
3.4.1 Backwards compatibility
Default operation designation is as RS232 interface with full hardware flow
control.
This is as GM47 except pin 32 (DSR/03) was a digital output pin (OUT5).
3.5 UART3 / IO# (Pins 43, 44)
UART3 has been given an alternative function as general purpose I/O.
Both pins may be used for either input or output. However, the TX pin has
a 100kΩ pull-down resistor to ground and the RX pin has a 100kΩ pull-up
resistor to 2.75V. This must be taken into consideration when designing
the host circuit.
3.5.1 Backwards compatibility
Default operation is general purpose inputs.
Differences between GM47 and GM47r5
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4 Software Differences
4.1 AT Commands
4.1.1 AT*E2IO
Changed designators:
With the exception of the four items listed below the GM47r5/GM48r5 will
operate successfully in any application designed for the GM47/GM48.
PIN GM47 Signal GM47r5 Signal
32 O5 O3
36 O6 O2
37 I5 I1
38 O7 01
Addressing these inputs and outputs with the designations referred to for
GM47 using the AT*E2IO command will return error when used on
GM47r5.
The GM47r5 will accept an extra parameter, 6, allowing pins to switch
functionality as required.
Note:
Pin 37 - GM47 ‘5’and GM47r5 ‘I1’ is now not a triggerable input.
The trigger functionality on this pin is lost in GM47r5. However - the
GM47r5 AT*E2IO command now supports the extra IO, ‘IO5’, which is
triggerable, and has the same functionality as ‘IO1’ to ‘IO4’.
4.1.2 AT*E2RS232
This is a new command recognised by the GR modules, not the GM.
When ‘Full RS232’ is selected (Factory default) all IO commands on these
pins will return ‘error’.
E.G. AT*E2IO commands on ‘I1’, ‘O1’, ‘O2’ and ‘O3’ will return error
unless AT*E2RS232 status is modified to allow operation on these pins.
Differences between GM47 and GM47r5
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4.2 Input & Output Cross Reference
SIGNAL GM47 GM47r5
I/O1 21 21
I/O2 22 22
I/O3 23 23
I/O4 24 24
I/O5 N/A 13
I/O6 N/A 33
I/O7 N/A 43
I/O8 N/A 44
I/O9 N/A 39
IN1 N/A 37
IN5 37 Now IN1
O1 N/A 38
O2 N/A 36
O3 N/A 32
O4 N/A 40
OUT5 32 Now O3
OUT6 36 Now O2
OUT7 38 Now O1
ADC1 26 26
ADC2 27 27
ADC3 28 28
ADC4 N/A 13
ADC5 N/A 22
DSR N/A 32
RI 36 36
DTR 37 37
DCD 38 38
RTS 39 39
CTS 40 40
Key: Unchanged New Altered
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