CY8CKIT-040 PSoC
®
4000 Pioneer Kit Guide, Doc. # 001-91316 Rev. *F
36
Hardware
■
Precision, programmable clocking
❐
3- to 62-MHz internal oscillator over full temperature and voltage range
❐
4- to 25-MHz crystal oscillator for crystal PPM accuracy
❐
Internal PLL clock generation up to 67 MHz
❐
32.768-kHz watch crystal oscillator
❐
Low-power internal oscillator at 1, 33, and 100 kHz
For more information, see the
4.3.1.3
Power Supply System
The power supply system on this board is versatile, allowing the input supply to come from the fol-
lowing sources:
■
5-V power from onboard USB programming header J10
■
5-V to 12-V power from Arduino shield using J1_01 (VIN on J1) header
■
VTARG - power from the onboard SWD programming using J6 or J7
■
VIN - J11 (not populated by default)
■
Coin cell battery - BT1 (not populated by default)
The PSoC 4 and PSoC 5LP are powered with either a 3.3 V or 5 V source. The selection between
3.3 V and 5 V is made through the J9 jumper. The board can supply 3.3 V and 5 V to the I/O headers
and receive 3.3 V from the I/O headers (J9 should select 3.3 V for this). The board can also be pow-
ered with an external power supply through the VIN (J11) header; the allowed voltage range for the
VIN is 5 V to 12 V. The LDO regulator regulates the VIN down to 3.3 V.
shows the power
supply block diagram and circuitry. In addition, there is a coin cell battery holder (BT1), which can
power the VDD line directly. The allowed voltage range supported through the coin cell battery is
between 1.8 V and 5.5 V (VDD specification of PSoC 4000 family). The BT1 holder is not populated
on the board by default. BU2032SM-BT-GTR (from Keystone Electronics) can be used for BT1. This
part supports CR2032 type coin cell batteries. See the
for details on
other parts that can be used for BT1.
Note:
The 5-V domain is directly powered by the USB (VBUS). For this reason, this domain is unreg-
ulated.
Figure 4-5. Power Supply Block Diagram and Schematic with Protection Circuits
I/O Header
US
B
PSoC 4
5V
Vin
3.3V
PSoC 5LP
USB
5V
P4A 10pin
Debug
P 5LP I/ O
Header
PTC
LDO
E S D
P rotection
MOS FE T based
P rotection Ckt
Coin cell
B attery Holder
Содержание CY8CKIT-040 PSoC 4000 Pioneer Kit
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