Analog Baseband (Abb) Processor - LG CG225 Service Manual

3.4.6. GPIO Map
In total 16 allowable resources, CG225 is using 13 resources except 3 resources dedicated to SIM and
Memory. CG225 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) VOICEMAIL_EN
I/O (1) MELODY_INT
I/O (2) SPK_EN
I/O (3) DSR (Note 1)
I/O (4) LCD_DIMCTRL1
I/O (5) SIM_PWCTL
I/O (6) BCLKX
I/O (7) LCD_RESET
I/O (8) IFMODE
I/O (9) PCM_TX
I/O (10) PCM_RX / INDLED_R
PCM_CLK /
I/O (11)
INDLED_G
I/O (12) PCM_SYNC / LCD_ID
I/O (13) HANDSFREE
I/O (14)
I/O (15)

3.5 Analog Baseband (ABB) Processor

3.5.1. General Description
IOTA is Analog Baseband (ABB) Chip supports GSM850/900,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
O
I
O
O
O
O
O
O
O
O
I
I
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
GPIO
DAI
DAI /GPIO
DAI / GPIO
DAI / GPIO
GPIO
MEMORY
MEMORY
- 25 -
Inactive State Active State
HIGH (Voice mai
LOW
or SPK phone)
HIGH LOW
HIGH (SPK phone
LOW
& MIDI sound)
HIGH LOW
LOW HIGH
(LCD B/L Off) (LCD B/L On)
LOW HIGH (@ PWR on)
HIGH (Normal LOW
Operation) (Reset)
LOW
HIGH
(@ CG200 LCD)
(Note 2) (Note 2)
LOW HIGH
(Red LED off) (Red LED on)
LOW HIGH
(Green LED off) (Green LED on)
LOW (HYeLCD) HIGH (SII LCD)
HIGH LOW (Handsfree)