Figure 7-35. Hud4022A Usb/Rs232/Sb9600 Schematic - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

Schematics, Component Location Diagrams, and Parts Lists: HUD4022A/HUD4025B (VHF) Main Board
U0300-1
MC74LCX125
USB_VPIN
3
UCTS1_USB_FSEN
U0300-2
MC74LCX125
URXD1_USB_VMIN
6
U0300-3
MC74LCX125
URTS1_USB_XRXD
8
USB_TXENB
UTXD1_USB_VPOUT
USB_VMOUT
RIA_USBSUSP
USB*_RS232_EN
U0303-2
MC74LCX125
BOOT_RX
BOOT_TX
BOOT_DATA_EN*
URXD2 URXD2
UTXD2 UTXD2
URTS2 URTS2
UCTS2 UCTS2
LHRST_OUT LHRST_OUT
LHRST_IN LHRST_IN
SB96_RS232*_EN SB96_RS232*_EN
6881096C74-B
1
USB_VPI
2
4
USB_VMI
5
10
9
VCC2.85
U0300-4
MC74LCX125
12
11
13
UTXD1_USB_VPOUT
UCTS1_USB_FSEN
URXD1_USB_VMIN
URTS1_USB_XRXD
U0308-1
NC7ST08
1
4
U0307-1
2
TC7S00FU
1
2
Part Series
600-1
SB9600 Block
BUS+_UARTB_TXD BUS+_UARTB_TXD
BUS-_UARTB_RXD BUS-_UARTB_RXD
RESET_UARTB_CTS RESET_UARTB_CTS
BUSY_UARTB_RTS BUSY_UARTB_RTS
VCC2.85
C0301
C0312
0.1uF
0.1uF
13
VREG
1 2
OE_N RCV
11 3
VO_VPO VP
12 4
FSE0_VMO VM
5 15
SUSPND VPU
16 10
ENUMERATE DPOS
6 9
MODE DNEG
8
USB_DET
U0304
ISP1104
USB_INT*
R0307
10K
8 9
U0303-3
MC74LCX125 10
11 12
U0303-4
13
MC74LCX125
4
VIP_OUT_1_3V
VIP_OUT_2_3V
VIP_IN_1_3V
VIP_IN_2_3V
Part Series
300
3 2
C0302
U0303-1
0.1uF
MC74LCX125 1
USB_PWR
R0303
1.5K
USB+
USB-
R0304 22
VCC5 VCC9
R0305 22
C0310 0.1uF
C0306
C0309 0.1uF
0.1uF
NP
1
C0307 0.1uF U0305
C1POS
ST3232
3
C1NEG
4
C0308 0.1uF
C2POS
5
C2NEG
13 12
R1I R1O
8 9
R2I R2O
11 14
T1I T1O
10 7
T2I T2O
BOOT_DATA_EN*
Part Series
600-2
VIP I/O Block
VIP_OUT_1_3V VIP_OUT_1_5V
VIP_OUT_2_3V VIP_OUT_2_5V
VIP_IN_1_3V VIP_IN_1_5V
VIP_IN_2_3V VIP_IN_2_5V

Figure 7-35. HUD4022A USB/RS232/SB9600 Schematic

7-37
BUFFER SUPPLY BUFFER SUPPLY
VCC2.85 VCC2.85
U0303-5 U0300-5
PWR_GND PWR_GND
VCC VCC
C0305
0.1uF
GND GND
VCC2.85
USB+
USB-
U0307-2
PWR_GND
VCC
C0311
0.1uF
GND
VCC5
U0308-2
PWR_GND
VCC
C0313
0.1uF
GND
UARTA_TXD
UARTA_CTS
UARTA_RXD
UARTA_RTS
USB*_RS232_EN Mode of Operation
0 0 Not Allowed
0
1 Boot Data
1
0 USB
1 1 RS232
VIP_OUT_1_5V
VIP_OUT_2_5V
VIP_IN_1_5V
VIP_IN_2_5V
MAEPF-27847-O
May 25, 2005