Hytera PD415 - Control Module

Circuit Descriptions
UHF1 (400‐470 MHz)
10
5.1.2 Control Module
The radio employs the STM32F101VET6(MCU)+SCT3928(Baseband IC) control solution.
STM32F101VET6 is the main controller unit (MCU), while SCT3928 is the baseband processor chip,
which is used for analog and digital modulation/demodulation, as well as digital voice encoding/decoding.
MCU communicates with SCT3928 via HPI BUS and connects to 512K EEPROM via I2C BUS.
STM32F101VET6 uses the frequency generated by 12 MHz crystal oscillator as the clock signal while
SCT3928 uses the frequency generated by 12.288 MHz crystal oscillator as the clock signal.
CODEC
TLV320AIC3204
STM32F101VET6
AMP
TDA2822D
MCLK
BCLK
WCLK
DIN
DOUT
MCLK
VDD3V3
12.288MHZ
SCL
SDA
Security Key
I
2
S
HPI[0..7]
VOICE
CODER
Protoccol
Stack
4FSK
FM
Demod
Channel
Selection
SCT3928
S0CLK
S0FS
S0DO
S0DI
S1CLK
S1FS
S1DO
S1DI
CLKIN
SCL
SDA
FLASH_CLK
FLASH_CE
FLASH_DI
FLASH_DO
MCU
PLL_CLK
PLL_CS
PLL_DATA
PLL_LD
MOD_VCO
MOD_REF
7.4VDC
DC-DC 3.6V
ADP2370ACPZ-R7
Fuse
3.6V
AF_IN
BEEP
3V3A
BAT
SW_channel
PTT
12MHZ
RESET
3V3D
EEPROM
I2C
3V3D
3V3D1 1V2
LOR
LOL
IN1R
IN1L
HPL
IN2L
serial port
VOX
VOX
EXT_interface
POWER SW
HCSN
HWRN
HRDN
RSTN
HOBIB
INTO
NMI
SK1 SK2
LED
POW_KEY_DET
TEM_LEV_DET_TC
PWR_CTRL_SI
FL_Fastlock_Ctrl
Pre_Fastlock_Ctrl
VCO_H_En
VCO_L_En
TV1\APC
BEEP1
TX_EN
RX_EN
RSSI
N_CON
SPK_EN
UART/USB
VOL
SW-
BATT_DEC
V_BAT
SW-
DC-DC 1.2V
ADP2370ACPZ-R7
1.2V
RP102N331B
3V3A
RP102N331B
3V3D
RP102N331B
3V3A_RX
RP102N331B
3V3_FGU
RP102N331B
3V3D1
XC6204F502PR
XC6204F502PR
5VFGU
5VRT
PWR_CTRL_SI
3V3D
Reset signal