Analog Baseband (Abb) Processor - LG MG180C Service Manual

3.4.6. GPIO Map
In total 16 allowable resources, MG180c is using 13 resources except 3 resources dedicated to SIM
and Memory. MG180c 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) IF_MODE
I/O (1) MELODY_INT
I/O (2) LCD_ID
I/O (3) DSR (Note 1)
LCD_BACKLIGHT
I/O (4)
(Note 2)
I/O (5) SIM_PWCTL
I/O (6) VOICEMAIL_EN
I/O (7) LCD_RESET
I/O (8) NOT USE
I/O (9) PCM_TX / Not used
I/O (10) PCM_RX
I/O (11) PCM_CLK / Not used
I/O (12) PCM_SYNC / Not used
I/O (13) NOT USE
I/O (14)
I/O (15)

3.5 Analog Baseband (ABB) Processor

3.5.1. General Description
IOTA is Analog Baseband (ABB) Chip supports GSM900,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)
I/O
O
I
I I
I
O
O
O
O
O
O
O
O
O
O
NBHE O
NBLE O
Table 3-6. GPIO Map Table
3. H/W Circuit Description
Resource State
GPIO
GPIO
GPIO
GPIO
GPIO
SIM
GPIO
GPIO
(Normal Operation)
GPIO
DAI / GPIO
DAI /GPIO
DAI / GPIO
DAI / GPIO
GPIO
MEMORY
MEMORY
- 25 -
Inactive State Active State
LOW HIGH
(8080 mode) (6400 mode)
HIGH LOW
LOW HIGH
(?) (?)
HIGH LOW
LOW HIGH
LOW HIGH
HIGH LOW
(Reset)
(Note 2) (Note 2)
(Note 2) (Note 2)
(Note 2) (Note 2)
(Note 2) (Note 2)