LG MG220, Service Manual

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3. H/W Circuit Description
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3.4.6. GPIO Map
In total 16 allowable resources, MG220 is using 13 resources except 3 resources dedicated to SIM
and Memory. MG220 GPIO (General Purpose Input/Output) Map, describing application, I/O state, and
enable level, is shown in below table.
3.5 Analog Baseband (ABB) Processor
3.5.1. General Description
IOTA is Analog Baseband (ABB) Chip supports GSM850, EGSM, DCS1800, PCS1900, GPRS Class
10 with Digital Basband Chip (Calypso).
IOTA processes GSM modulation/demodulation and power management operations.
Block Description
• Audio Signal Processing & Interface
• Baseband in-phase(I), quadrature(Q) Signal Processing
• Auxiliary RF converters
• Five-channel analog-to-digital converters (ADC)
Table 3-6. GPIO Map Table
I/O # Application I/
O
Resource
State
Inactive
State
Active
State
I/O (0) FOLDER
O GPIO
LOW
(CLOSE)
HIGH
(OPEN)
I/O (1) MELODY_INT I GPIO HIGH LOW
I/O (2) SPK_PHN_EN O GPIO
LOW
(MIDI sound)
HIGH
(SPK phone)
I/O (3) DSR
(Note 1)
I GPIO HIGH LOW
I/O (4) LCD_BACKLIGHT
O GPIO
LOW
(LCD B/L Off)
HIGH
(SET/ B/L On)
I/O (5) SIM_PWCTL O SIM
I/O (6) BCLKX
O GPIO LOW
HIGH
(@ PWR on)
I/O (7) LCD_RESET
O GPIO HIGH
LOW
(Reset)
I/O (8) LCD_ID I GPIO
LOW
(Hye LCD)
HIGH
(SII LCD)
I/O (9) CAM_INT I GPIO
HIGH (IDLE)
LOW
(INTERRUPT)
I/O
(10)
CHARGE_LED O GPIO
LOW
(Red LED on)
HIGH
(Green LED on)
I/O
(11)
RCV_SPK_SEL O GPIO
LOW
(RCV SEL)
HIGH
(SPK SEL)
I/O
(12)
IFMODE O GPIO
LOW
(8Bit)
HIGH
(16bit)
I/O
(13)
Not used GPIO
I/O (14)
NBHE O MEMORY
I/O
(15)
NBLE O MEMORY
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