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2.5.6 Control Circuit
The control circuit mainly consists of MPU/DSP (IC33) and FPGA (IC60) and their peripheral circuits. Furthermore, IC33 is composed
of an ARM processor based on ARM Cortex-A15 and a DSP based on C66x.
Their main tasks are as follows.
(1) The MPU manages the operation of the Repeater and the external interface.
(2) The DSP manages the transmit/receive data.
(3) The FPGA manages the power supply of the Repeater and exchanges the transmit/receive data between the DSP and the RF
section.
IC52
NOR FLASH
IC4
RTC
IC251
High-side SW
J9
USB
J7
LAN
IC81
Ethernet
PHY
LED
CN7
DISPLAY
S4000
KNOB
J4
CONTROL I/O
(D-SUB 25-pin)
UART
GPIO
RESET, RSSI
AO1, AO2
RA
TA
RD
TD
IC520
IC47, 48
Lower DDR3
eMMC
Upper DDR3
IC33
MPU/DSP
ARM
Cortex-A15
DSP C66x
IC602
BUS BUFF
IC84
RS232C DRV
IC82, 83
BUS SW
RSSI
Q453
RESET
Q451, 452
IC42
CODEC
Fig.4 Control circuit
IC1
PWR MNG
IC60
Power
Management
FPGA
SPI
I2S
McASP
I2S
FAN
Q3060, 3061
IC3022
9.0V AVR
IC2000
TX PLL
PLL_MOD
IC670
CODEC
VCO_MOD
IC700
SSI
IF IC
IC1001
RX PLL
IC76
ADC
IC77
DAC
IC78
DAC
(No.RA094<Rev.002>)1-17
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Troubleshooting
