ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 92

• Manufacturer Part Number: ST7LITE49K2
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST7LITE49K2

• 8 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection In-circuit Programming And In-application Programming (icp And Iap) Endurance: 10K write/erase cycles guaranteed Data retention
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: Internal trimmable 8 MHz RC oscillator, auto-wakeup internal low power - low frequency oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-halt, Auto-wakeup from Halt, Wait and Slow

On-chip peripherals
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Figure 45. Block diagram of input capture mode
Figure 46. Input capture timing diagram
Long range input capture
Pulses that last more than 8 µs can be measured with an accuracy of 4 µs if f
MHz in the following conditions:
●
●
●
●
This configuration allows to cascade the Lite timer and the 12-bit AT4 timer to get a 20-bit
input capture value. Refer to
COUNTER1
ATIC
ICF FLAG
f
ATIC PIN
COUNTER
The 12-bit AT4 timer is clocked by the Lite timer (RTC pulse: CK[1:0] = 01 in the ATCSR
register)
The ICS bit in the ATCSR2 register is set so that the LTIC pin is used to trigger the AT4
timer capture.
The signal to be captured is connected to LTIC pin
Input Capture registers LTICR, ATICRH and ATICRL are read
32 MHz
f
(1 ms
@ 8MHz)
LTIMER
timebase
f
OFF
CPU
01h
ATCSR
02h
xxh
ATICR
ICF
03h
CNTR1
12-BIT INPUT CAPTURE REGISTER
ATR1
Figure
ICIE
04h
12-BIT AUTORELOAD REGISTER
47.
IC INTERRUPT
CK1
12-BIT UPCOUNTER1
REQUEST
05h
CK0
INTERRUPT
06h
07h
04h
08h
ATICR READ
09h
ST7LITE49K2
OSC
0Ah
09h
equals 8
INTERRUPT
t