FO-CC500A
FO-K01A
5 – 17
Microphone Input. The Codec provides a microphone interface for
an electret microphone. The microphone input is differential to reduce
common mode noise pickup. The microphone must be AC-coupled to
the MICINP and MICINN inputs. A quiet, clean voltage (MICBIAS) is
available to provide a bias for the electret microphone. The micro-
phone input amplifier has programmable gains from -4 to 28 dB (-4, 0,
6, 12, 18, 24, and 28 dB), to accommodate a wide range of micro-
phone sensitivities. The microphone input is multiplexed with the line
input signal before the A/D conversion.
Line Input. The Codec line input is an auxiliary input which may be
used as an alternative analog interface. For example, this interface
may be used between the base station Codec and the PSTN. The
line input, before final A/D conversion, is multiplexed with the micro-
phone input signal.
Fig. 12 Typical System Block Diagram for the 128-pin Merlin XROM ASIC
MVCS
MVDI
MVDO
MVCLK
OHP
RINGP
LINEIN
SPKROP
SPKRON
MICINN
MICINP
LINEO
(on handset,AUXDAC and
GPIOA6 may be used)
earpiece
microphone
Serial
EEPROM
32-Pin
Merlin
Codec
External
ROM
External
device
LNAATN
RXEN
RXIP
RXIN
RXQP
RXQN
AGC
SYNEN
REFOSC
SYNSTB
SYNDATA
SYNCLK
TXDATA
TXEN
TXPWR0
TXPWR1
TRSW
Keypad
LCD
DATA
LCDRS
LCDPWR
LCDRW
DATA[7:0]
ADDR[15:0]
ROMCSP
RDP
HOSTCSP
HOSTIRQ
HOSTACK
optional
Base station only
Handset only
WRP
LCDEN
Emulator
(Development
System Only)
EMUCLK
SYNC
NMIP
Keypad
column 1-6
Keypad
row 1-8
CDCDATAI
CDCDATAO
CDCFRAME
ICLK
MCLK
RESETOP
Base Station
/PSTN
Interface
128-Pin
Merlin
XROM
900MHz
or
2.4GHz
Radio
Line output. LINEO is a single-ended output capable of driving a 1
k
Ω
load. The output amplifier has programmable gains from -35 dB to
1.1 dB in 6 dB steps.
Speaker Output. The SPKROP and SPKRON signals form a differ-
ential output capable of driving a 150
Ω
resistive load or a highly ca-
pacitive (100 nF) ceramic receiver via dual 150
Ω
series resistors.
This output may be used to drive either the PSTN or the handset
earpiece. The output amplifier has programmable gains from -29 dB
to 3 dB.
7) Power Requirements
All six of the ASICs in the Merlin family of spread spectrum devices
operate 2.7 to +3.3 V. Each of the ASICs has an active, low
power consumption of less than 60 mW (+3.3 V) and a very low power
stand-by consumption of less than 3 mW (+3.3 V).
Summary of Contents for FO-CC500
Page 82: ...FO CC500A FO K01A Control PWB parts layout Top side 6 7 ...
Page 83: ...FO CC500A FO K01A Control PWB parts layout Bottom side 6 8 ...
Page 87: ...FO CC500A FO K01A LIU PWB parts layout Top side 6 12 ...
Page 88: ...FO CC500A FO K01A LIU PWB parts layout Bottom side 6 13 ...
Page 92: ...FO CC500A FO K01A 6 17 Cordless PWB parts layout Top side ...
Page 93: ...FO CC500A FO K01A 6 18 Cordless PWB parts layout Bottom side ...