User's Manual

5
2. Module Interfaces
2.1 HM2401 Dimensions
HM2401 dimensions: 19.7mm(W)*32.8mm(L)*3.5mm(H)
Figure 1 shows the HM2401 dimensions.
Figure 1 HM2401 dimensions
2.2 Pin Definition
This Table 1 describes the interface pins .
NO.
Symbol
I/O Type
Function
1
Gnd
P
Power supply reference ground pin
2
NC
I
Null pin, no internal connection
3
P1.5
I/O
RESERVED, P1.5, which is connected to P1.5 on
the IC
4
P1.6
I/O
RESERVED, P1.6, which is connected to P1.6 on
the IC
5
P0.1
I/O
RESERVED ,P0.1, which is connected to P0.1 on