SN8P2318 Series
C-type LCD, RFC 8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 10
Version 1.5
1.4 PIN DESCRIPTIONS
PIN NAME
TYPE
DESCRIPTION
VDD, VSS
P
Power supply input pins for digital and analog circuit
(
VLCD and VDD pin have to short
together).
VLCD
P
LCD power source
(
VLCD and VDD pin have to short together).
C+, C-
P
LCD C-type charge pump output pins.
LCD C-type: Connected a 0.1uF capacitor.
LCD R-type: Low status.
V1, V2
P
LCD bias voltage. 1/2 bias: V1 = V2. 1/3 bias: V1 = 1/3*Vdd, V2 = 2/3*Vdd.
LCD R-type: Connect external resistors to decide bias voltage and current.
P0.3/RST/VPP
I, P
RST: System external reset input pin. Schmitt trigger structure, active “low”, normal stay to “high”.
VPP: OTP 12.3V power input pin in programming mode.
P0.3: Input only pin with Schmitt trigger structure and no pull-up resistor. Level change wake-up.
XIN
I/O
XIN: Oscillator input pin while external oscillator enable (crystal and RC).
In PLL_16M mode, XIN connects a decouple 0.1uF capacitor to VDD.
XOUT/P0.4/FCPUO
I/O
XOUT: Oscillator output pin while external crystal enable.
P0.4: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
FCPUO: Fcpu clock signal output pin as High_Clk code option=RC.
LXIN
I
LXIN: Low-speed oscillator input pin.
LXOUT/FLO
O
LXOUT: Low-speed oscillator output pin.
FLO: Low-speed RC type oscillator Flosc freq output pin as Low_Clk code option=RC.
P0.0/INT0
I/O
P0.0: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
INT0: External interrupt 0 input pin.
TC0 event counter input pin.
P0.1/INT1
I/O
P0.1: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
INT1: External interrupt 1 input pin.
P0.2/T1IN
I/O
P0.2: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
T1 event counter input pin.
P1.0/RFC0
I/O
P1.0: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
RFC0: RFC channel 0.
P1.1/RFC1
I/O
P1.1: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
RFC1: RFC channel 1.
P1.2/RFC2
I/O
P1.2: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
RFC2: RFC channel 2.
P1.3/RFC3
I/O
P1.3: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
RFC3: RFC channel 3.
P1.4/RFC4
I/O
P1.4: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
RFC4: RFC channel 4.
P1.5
I/O
P1.5: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
P1.6/RFCOUT
I/O
P1.6: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters. Level
change wake-up.
RFCOUT: RFC oscillating signal output pin.
P5.4/ PWM0
I/O
P5.4: Bi-direction pin. Schmitt trigger structure as input mode. Built-in pull-up resisters.
PWM0: Programmable PWM output pin from TC0.
P2[7:0]/
SEG[31:24]
I/O
P2[7:0]: Bi-direction pin. No Schmitt trigger structure. Built-in pull-up resisters.
SEG[31:24]: LCD segment output pins.
P3[7:0]/
SEG[23:16]
I/O
P3[7:0]: Bi-direction pin. No Schmitt trigger structure. Built-in pull-up resisters.
SEG[23:16]: LCD segment output pins.
SEG[15:0]
O
SEG[15:0]: LCD segment output pins.
COM[3:0]
O
COM[3:0]: LCD common 0~3 output pins.