ST7FLITE20F2B6 STMicroelectronics, ST7FLITE20F2B6 Datasheet - Page 36

• Manufacturer Part Number: ST7FLITE20F2B6
• Description: IC MCU 8BIT 8K FLASH 20DIP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITE20F2B6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Processor Series: ST7FLITE2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 384 B
• Interface Type: SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 4 bit
• Operating Supply Voltage: 2.4 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Development Tools By Supplier: ST7FLIT2-COS/COM, ST7FLITE-SK/RAIS, ST7MDT10-DVP3, ST7MDT10-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 13 bit
• For Use With: 497-5858 - EVAL BOARD PLAYBACK ST7FLITE497-5517 - EVAL BOARD 1PHASE ENERGY METER497-5049 - KIT STARTER RAISONANCE ST7FLITE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: In Transition
• Other names: 497-4856

ST7LITE2
INTERRUPTS (Cont’d)
EXTERNAL INTERRUPT CONTROL REGISTER
(EICR)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7:6 = IS3[1:0] ei3 sensitivity
These bits define the interrupt sensitivity for ei3
(Port B0) according to
Bit 5:4 = IS2[1:0] ei2 sensitivity
These bits define the interrupt sensitivity for ei2
(Port B3) according to
Bit 3:2 = IS1[1:0] ei1 sensitivity
These bits define the interrupt sensitivity for ei1
(Port A7) according to
Bit 1:0 = IS0[1:0] ei0 sensitivity
These bits define the interrupt sensitivity for ei0
(Port A0) according to
Notes:
1.These 8 bits can be written only when the I bit in
the CC register is set.
2. Changing the sensitivity of a particular external
interrupt clears this pending interrupt. This can be
used to clear unwanted pending interrupts. Refer
to section “External Interrupt Function” on
page 46.
Table 6. Interrupt Sensitivity Bits
.
36/133
1
ISx1 ISx0
IS31
0
0
1
1
7
IS30
0
1
0
1
IS21
External Interrupt Sensitivity
IS20
Falling edge & low level
Rising and falling edge
Table
Table
Table
Table
Falling edge only
Rising edge only
IS11
6.
6.
6.
6.
IS10
IS01
IS00
0
EXTERNAL INTERRUPT SELECTION REGIS-
TER (EISR)
Read/Write
Reset Value: 0000 1100 (0Ch)
Bit 7:6 = ei3[1:0] ei3 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei3 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
Note:
1. Reset State
Bits 5:4 = ei2[1:0] ei2 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei2 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
Notes:
1. Reset State
2. PB4 cannot be used as an external interrupt in
HALT mode.
ei31
7
ei31
ei21
0
0
1
0
0
1
1
ei30
ei30
ei20
ei21
0
1
0
0
1
0
1
ei20
ei11
I/O Pin
I/O Pin
PB0
PB3
PB4
ei10
PB1
PB2
PB5
PB6
1)
1)
2)
ei01
ei00
0