Users Manual

FEDK71521-01
MK71521/MK71521A
2/14
● Lineup
Certified
product name
Official product name
Flash code
32.768kHz
crystal oscillator
Status
Remarks
MK71521
MK71521-NNNYEZ05B
Blank
Equipped
In mass
production
T&Rpacking
(500 pieces)
MK71521
MK71521A-NNNYEZ05B
Blank
Not equipped
In development
T&Rpacking
(500 pieces)
■ Block Diagram
（※）MK71521A does not built-in a 32.768KHz crystal oscillator.
ANTENNA
DCDC
LC Filter
X’tal
32MHz
X’tal
32.768kHz
（※）
ANT
RFIO
MK71521/MK71521A
Bluetooth
®
low energy LSI
nRF52832
SWDCLK
SWDIO
P0.02 to P0.31
30
VBAT
DCO
Filter
XL2/P0.01
XL1/P0.00
ANT
DCC
DEC4
XC1
XC2
XL1
XL2