C8051T620-DK Datasheet, PDF (15/30 Pages) Silicon Laboratories – C8051T620/2 DEVELOPMENT KIT USER’S GUIDE

C8051T620/2-DK
Table 2 lists the port pins and headers corresponding to the switches, LEDs, and potentiometer.
Table 2. Motherboard I/O Descriptions
Description
Switch
Switch
RESET
Green LED labeled “LED1”
Green LED labeled “LED2”
Red LED labeled “PWR”
Red LED labeled “VPP”
Green LED labeled “RUN”
Red LED labeled “STOP”
Orange LED labeled “DEBUG PWR”
Green LED labeled “USB ACTIVE”
Potentiometer
Component Name
SW1
SW2
SW3
D1
D2
D4
D7
D10
D11
D12
D13
R8
I/O
Daughter Card's P0.1
Daughter Card’s P2.0
Daughter Card’s P1.0
Daughter Card’s P2.1
Daughter Card's RST/C2CK
Daughter Card's P0.6
Daughter Card's P2.2
Daughter Card’s P1.2
Daughter Card's P2.3
Daughter Card's VDD
Daughter Card's VPP pin
(See "VPP Pin Sharing" on
page 17)
Debug Adapter Signal
Debug Adapter Signal
Debug Adapter Signal
U2 CP2103's SUSPEND
Daughter Card's P2.5
Header
J9 [2-4]
J9 [4-6]
J9 [1-3]
J9 [3-5]
None
J10 [2-4]
J10 [4-6]
J10 [1-3]
J10 [3-5]
J6, J7
J15
None
None
None
None
J12
7.3. Power Supply Headers (J6 and J7)
The main power supply of the motherboard, which is used to power the daughter board, can be provided by either
the USB Debug Adapter’s on-chip voltage regulator, the CP2103 USB-to-UART bridge’s on-chip voltage regulator,
P3 and its associated circuitry, or an external voltage applied to the VDD_EXT connection on J1. To select a power
supply, place a shorting block on J6 across the appropriate pin pair, as shown in Figure 12. To connect the main
power supply to an attached daughter board, place a shorting block across J7.
Notes:
1. Only one shorting block should be placed on J6 at a time.
2. To use the CP2103’s voltage regulator as the board's power supply, a USB cable must be connected to P4, and the USB
ACTIVE LED (D2) must be on.
3. To use the USB Debug Adapter’s voltage regulator as the board's power supply, a USB cable must be connected to P5,
and the DEBUG PWR LED (D12) must be on.
J7
VDD_T620
VDD_PWR
J6
+3VD
VDD_EXT
VDD_DEBUG
VDD_COMM
VDD_PWR
+3.3V Regulator Power
(From P3)
J7
VDD_T620
VDD_PWR
J6
+3VD
VDD_EXT
VDD_DEBUG
VDD_COMM
VDD_PWR
CP2103 Regulator Power
(From USB at P4)
J7
VDD_T620
VDD_PWR
J6
+3VD
VDD_EXT
VDD_DEBUG
VDD_COMM
VDD_PWR
Debug Circuit Power
(From USB at P5)
J7
VDD_T620
VDD_PWR
J6
+3VD
VDD_EXT
VDD_DEBUG
VDD_COMM
VDD_PWR
External Power Source
(From J1 Connector)
Figure 12. J6 and J7 Shorting Block Configuration for Power Options
Rev. 0.5
15