ST7FLITE02 STMICROELECTRONICS [STMicroelectronics], ST7FLITE02 Datasheet - Page 26

• Manufacturer Part Number: ST7FLITE02
• Description: 8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST7LITE0x, ST7LITESx
Figure 12. PLL Output Frequency Timing
Diagram
When the PLL is started, after reset or wakeup
from Halt mode or AWUFH mode, it outputs the
clock after a delay of t
When the PLL output signal reaches the operating
frequency, the LOCKED bit in the SICSCR register
is set. Full PLL accuracy (ACC
a stabilization time of t
13.3.4 Internal RC Oscillator and
Refer to
of the LOCKED bit in the SICSR register.
7.3 REGISTER DESCRIPTION
MAIN CLOCK CONTROL/STATUS REGISTER
(MCCSR)
Read / Write
Reset Value: 0000 0000 (00h)
Bits 7:2 = Reserved, must be kept cleared.
Table 5. Clock Register Map and Reset Values
26/125
1
4/8 x
input
freq.
Address
7
0
(Hex.)
0038h
0039h
t
STARTUP
section 8.4.4 on page 37
0
MCCSR
Reset Value
RCCR
Reset Value
Register
0
t
Label
LOCK
0
STARTUP
STAB
LOCKED bit set
0
CR7
7
0
1
(see
t
PLL
.
STAB
) is reached after
PLL)
0
for a description
Figure 12
CR6
MCO
6
0
1
SMS
t
and
0
CR5
5
0
1
Bit 1 = MCO Main Clock Out enable
This bit is read/write by software and cleared by
hardware after a reset. This bit allows to enable
the MCO output clock.
0: MCO clock disabled, I/O port free for general
1: MCO clock enabled.
Bit 0 = SMS Slow Mode select
This bit is read/write by software and cleared by
hardware after a reset. This bit selects the input
clock f
0: Normal mode (f
1: Slow mode (f
RC CONTROL REGISTER (RCCR)
Read / Write
Reset Value: 1111 1111 (FFh)
Bits 7:0 = CR[7:0] RC Oscillator Frequency Ad-
justment Bits
These bits must be written immediately after reset
to adjust the RC oscillator frequency and to obtain
an accuracy of 1%. The application can store the
correct value for each voltage range in EEPROM
and write it to this register at start-up.
00h = maximum available frequency
FFh = lowest available frequency
Note: To tune the oscillator, write a series of differ-
ent values in the register until the correct frequen-
cy is reached. The fastest method is to use a di-
chotomy starting with 80h.
CR7
purpose I/O.
7
CR4
4
0
1
OSC
CR6
or f
CR3
CR5
OSC
3
0
1
CPU =
/32.
CPU =
CR4
f
OSC
CR2
f
OSC
2
0
1
/32)
CR3
CR2
MCO
CR1
1
0
1
CR1
SMS
CR0
0
0
1
CR0
0