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FM8P54/56
Rev1.21 May 31, 2005
P.3/FM8P54/56
FEELING
TECHNOLOGY
PIN CONNECTION
PDIP, SOP
SSOP
FM8P54/54E
FM8P56/56E
IOA2
18
1
17
16
15
14
13
12
11
10
2
3
4
5
6
7
8
9
IOA3
T0CKI
RSTB
Vss
IOB0/INT
IOB1
IOB2
IOB3
IOA0
OSCI
IOA1
OSCO
IOB7
IOB6
Vdd
IOB5
IOB4
FM8P54/54E
FM8P56/56E
IOA2
IOA3
T0CKI
RSTB
Vss
Vss
IOB0/INT
IOB1
IOB2
IOA0
OSCI
IOA1
OSCO
Vdd
IOB7
Vdd
IOB6
IOB5
IOB3
IOB4
20
1
19
18
17
16
15
14
13
12
2
3
4
5
6
7
8
9
11
10
PIN DESCRIPTIONS
Name
I/O
Description
IOA0 ~ IOA3
I/O
IOA0 ~ IOA3 as bi-direction I/O port
IOB0/INT
I/O
Bi-direction I/O pin with system wake-up function / External interrupt input
IOB1 ~ IOB7
I/O
Bi-direction I/O port with system wake-up function
T0CKI
I
Clock input to Timer0. Must be tied to Vss or Vdd, if not in use, to reduce current
consumption
RSTB
I
System clear (RESET) input. This pin is an active low RESET to the device.
OSCI
I
X’tal type: Oscillator crystal input
RC type: Clock input of RC oscillator
OSCO
O
X’tal type: Oscillator crystal output.
RC mode: Outputs with the instruction cycle rate
Vdd
-
Positive supply
Vss
-
Ground
Legend: I=input, O=output, I/O=input/output