Analog Baseband (Abb) Processor - LG MG210 Service Manual

3.4.6. GPIO Map
In total 16 allowable resources, MG210 is using 13 resources except 3 resources dedicated to SIM
and Memory. MG210 GPIO (General Purpose Input/Output) Map, describing application, I/O state, and
enable level, is shown in below table.
I/O # Net Name
I/O (0)
INDLED_R
I/O (1) MELODY_INT
I/O (2) LCD_ID
I/O (3) DSR
I/O (4) LCD_BL_EN
I/O (5) SIM_PWCTL
SPK_PHN_EN
I/O (6)
LCD_RESET
I/O (7)
RCV_SPK_SEL
I/O (8)
PCM_TX
I/O (9)
PCM_RX
I/O (10)
PCM_CLK
I/O (11)
PCM_SYNC
I/O (12)
NOT USED
I/O (13)
I/O (14) NBHE
I/O (15) NBLE

3.5 Analog Baseband (ABB) Processor

3.5.1. General Description
IOTA Shrink is Analog Baseband (ABB) Chip supports GSM850, GSM900, DCS1800, PCS1900,
GPRS Class 10 with Digital Basband Chip (Calypso).
IOTA Shrink processes GSM modulation/demodulation and power management operations.
Block Description
• Audio Signal Processing & Interface
• Baseband in-phase(I), quadrature(Q) Signal Processing
• RF interface with DBB (time serial port)
• Supply voltage regulation
Resource
I/O
State
O
GPIO
I GPIO
I GPIO
I GPIO
O GPIO
O SIM
O GPIO
O GPIO
O GPIO
O
I
O
O
O MEMORY
O MEMORY
Table 3-5. GPIO Map Table
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3. H/W Circuit Description
Inactive Active
State State
LOW HIGH
HIGH LOW
LOW
HIGH LOW
LOW HIGH
LOW HIGH
HIGH LOW
LOW(ABB) HIGH(MIDI)