Hytera MD78X Service Manual page 271

MD78X/MD78XG Block Diagram (BB Section)
BB Schematic Block Diagram
AUX
TEMP_DET
ADC
Audio Codec
Headset
Driver
Mic CP
SPI
BELL
AMP Driver
TXAF_DI
RXAF_DO
CS3
LTR/OPTION
BOARD/BLUETOOTH
Audio PA
AUX Audio
McBSP1
IIS
McBSP3
MCLK19.2MHz
PWM0/
PWT
uWire
UART3
GPIOs
IIC
USB1
DC Supply
PRGM GPIOS
USB
Rear
GPIO
ACC_ID
Accessory(MAP)
USB
ACC_ID
MIC
SPKr
Control Head
PLL
IF processor DAC
SSI SSI
SPI
MCSI1 SPI McBSP2
DSP
TMS320C55x
OMAP5912
MPU
ARM926EJ-S
GPIOs
PRGM IO out
74hc595
GPIO
74hc595
Expand
PRGM
TX_RX
IO Expand
GPIOs
light/LED/LCD
backlight
MMP
258
RF Unit
TX RX CTL
GPIOs
datax16
Speed:96MHz(max)
JTAG
CLK
32KHz
IIC
UART1
KEY UART2
GPIOs
Trax or GPIO
UART or
Keytrax 3X4
LED
Volume
EMIFS
datax8
TFT LCD
ON/OFF KEY
PWB
Nor FLASH and pSRAM
FLASH: 8Mx16
pSRAM:2Mx16
Mobile SDRAM
128Mb:8Mx16
JTAG
19.2MHz
19.2MHz
AD9864
TCXO
RTC
32.768KHz
20ppm
IIC
Accelero
meter
GPS
IGN_SENSE
EMERGENCY
User Program
PWB