Schematics

Spreadtrum communications, Inc.
COMPANY:
Hardware DEPT.
DOCUMENT NO.:
DEPARTMENT:
DATED:
DATED:
DATED:
APPROVED:
DESIGNER:
EQA:
ECO NO: DATE:APPROVED:
REVISION RECORD
LTR
A
D
C
6
A
B
C
D
5 4 3 2 1
B
TITLE & REV:
CONFIDENTIAL AND PROPRIETARY
Test Points
NBOOT
USB Connector
MARK POINT
SharkL3 strapping pin
Ball name
U1TXD
Signal name in boot code
USB_DLOAD_EN
Value
Descriptions Default vale
0
1
000
001
010
011
100
111
USB download(no time out)
UART download(Default)
TLC NAND Toggle
Reserved
1(ie=1,wpu)
ADI_SCLK
ARM_BOOT_MD2
ARM_BOOT_MD1
ARM_BOOT_MD0
AUD_DAD1
AUD_DAD0
MLC/SLC NAND Flash(ONFI)
SD boot (no time out)
MLC/SLC NAND Flash(Toggle)
eMMC boot
111(ie=1,wpu)
(MSB:md2
110
101
TLC NAND ONFI(Hynix/ Toshiba/Sandisk)
Reserved
LSB:md0)
R6231 1K
TP6220 TP6219
1
FD6201
FID-C100-M200-K200
1
FD6202
FID-C100-M200-K200
1
FD6203
FID-C100-M200-K200
1
FD6204
FID-C100-M200-K200
T6215 T6216
1
FD1
BAD-MARK
1
FD2
BAD-MARK
D2502
2*2&123
C2506
1uF
TB4101
TB4102
1
TP4105
1
TP4106TB4103
VR3 VR4
1
VCHG
2
DM
3
DP
4
NC
5
GND
6
GND
7
GND
8
GND
9
GND
10
GND
11
GND
J6201
USB-U20-CB05F250
VR2
D3
2*2&123
L1
100nH
L2
100nH
BB_U1TXD
[11]
BB_U1RXD_GPIO71
[11]
BB_U0RXD
[11]
BB_U0TXD
[11]
CON_USB_DP [5,19]
CON_USB_DM
[5,19]
USBID_CRTL
[11,19]
VCHG
[18]
USBID_CRTL
[11,19]
CON_USB_DP
[5,19]
CON_USB_DM
[5,19]
CON_USB_DM
[5,19]
CON_USB_DP
[5,19]
USB_SHILDING
[22]