© 2014 ISSC Technologies Corp.
27
5.
Appendix A: BM77SPP03 Module PIN Assignment
EA
N
LED
P37
P05
P36
P34
UA
R
T
_
C
T
S
/
P
1
7
UA
R
T
_
R
TS
/ P
0
0
BT_RF1
P04
RST_N
UART_TXD
P20
P33
P15
BAT_IN
UART_RXD
P24
P31
WAKEUP
P13/SDA
P12/SCL
U4
1
2
3
4
5
6
7
8
9
10
11
12
30
29
28
27
26
25
24
23
22
21
20
19
13
14
15
16
17
18
GND
BAT_IN
SW_BTN
LDO33_O
VDD_IO
LDO18_O
WAKEUP_SI1
PMULDO_O
P04
P15
P12 / SCL
P13 / SDA
BT_RF
GND
LED1
P37
P36
P34/SCLK
P33/MOSI
P32/MISO
P31/NCS
HCI_TXD
HCI_RXD
RST_N
P1
7
P
0_5/
T
X
_C
LS
1
P0
0
P2
0
P
2_4/
R
X
_
C
LS
1
EA
N
PMULDO_O
P32
SW_BTN
BM77 Module PIN Define
P/N
I/O
Name
Description
1 P
GND
Ground
2 P
BAT_IN 4.2~3.3V
Power
input
3 I
SW_BTN
Input for software button.
H: Power On
L: Power Off
4
P
LDO33_O
3V3 LDO output
5 P
VDD_IO Main
power
supply
6 P
LDO18_O
LDO18
output
7 I
WAKEUP
Wakeup BM77 from Shutdown State. (Low Active)
It is only valid while BM77 into Shutdown State.
8 P
PMULDO_O
Output
of
PMULDO
9 O
P04
UART_TX_IND:
H: BM77 indicate UART data will be transmitted out after a certain timing.
(Setting by EEPROM, default 5ms)
L: Otherwise.
STATUS_IND_2:
BM77 State indication , refer to P15
