ST7FOXK1 STMicroelectronics, ST7FOXK1 Datasheet - Page 38

• Manufacturer Part Number: ST7FOXK1
• Description: Low cost flash 8bit micro
• Manufacturer: STMicroelectronics

Specifications of ST7FOXK1

• 4 To 8 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection In-circuit Programming And In-application Programming (icp And Iap) Endurance: 1K write/erase cycles guaranteed Data retention
• 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
• A/d Converter: up to 10 input channels

Supply, reset and clock management
6.2
38/226
Figure 12. Clock management block diagram
Multi-oscillator (MO)
The main clock of the ST7 can be generated by four different source types coming from the
multi-oscillator block (1 to 16 MHz):
Each oscillator is optimized for a given frequency range in terms of consumption and is
selectable through the option byte. The associated hardware configurations are shown in
Table
CLKIN
CLKIN
/OSC1
OSC2
An external source
5 different configurations for crystal or ceramic resonator oscillators
An internal high frequency RC oscillator
8. Refer to the electrical characteristics section for more details.
f
OSC
CK2
1-16 MHz
or 32kHz
OSC
CR9
Prescaler
CK1
CLKIN
CLKIN
CLKSEL[1:0]
CR8
/32 DIVIDER
Option bits
8 MHz (f
CK0
CR7
RC
Tunable
RC
CR6
500 kHz
Oscillator
)
8 MHz
4 MHz
2 MHz
1 MHz
DIVIDER
CR1
CR5
/2
OSC
CR0
RC OSC
LITE TIMER 2 COUNTER
CR4
f
f
OSC
OSC
MCO
DIVIDER
CLKIN/2
/32
/2
CR3
8-BIT
SMS
1
0
Clock controller
CR2
MCCSR
PSCR
AWU RC OSC
RCCRH
(1ms timebase @ 8 MHz f
ST7FOXF1, ST7FOXK1, ST7FOXK2
f
LTIMER
f
CPU
RCCRL
CLKIN/2
OSC/2
f
CPU
RC/AWU
CLKSEL[1:0]
TO CPU AND
PERIPHERALS
AT TIMER 2
Option bits
12-BIT
CKCNTCSR
f
CPU
OSC
f
OSC
)
MCO