ST7LIT15BF0 STMicroelectronics, ST7LIT15BF0 Datasheet - Page 66

• Manufacturer Part Number: ST7LIT15BF0
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, 5 TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7LIT15BF0

• Up To 4 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55˚C.
• 128 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55˚C.
• Clock Sources: Internal 1% RC oscillator (on ST7FLITE15B and ST7FLITE19B), crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Auto Wake-up from Halt, Wait and Slow

ST7LITE1xB
DUAL 12-BIT AUTORELOAD TIMER 4 (Cont’d)
– At the second input capture on the falling edge of
Figure 46. Long Range Input Capture Timing Diagram
66/159
1
the pulse, we assume that the values in the reg-
isters are as follows:
LTICR = LT2
ATICRH = ATH2
ATICRL = ATL2
Hence ATICR2 [11:0] = ATH2 & ATL2
f
TB Counter1
CNTR1
LTIC
LTICR
ATICRH
ATICRL
OSC/32
_ _ _
F9h
00h
00h
0h
00h
LT1
ATH1 & ATL1
F9h
00h
Now pulse width P between first capture and sec-
ond capture will be:
P = decimal (F9 – LT1 + LT2 + 1) * 0.004ms + dec-
imal ((FFF * N) + N + ATICR2 - ATICR1 – 1) * 1ms
where N = No of overflows of 12-bit CNTR1.
ATH1
LT1
ATL1
_ _ _
_ _ _
ATICR = ATICRH[3:0] & ATICRL[7:0]
_ _ _
_ _ _
LT2
_ _ _
ATH2 & ATL2
ATH2
ATL2
LT2
_ _ _