ST7FOXK1 STMicroelectronics, ST7FOXK1 Datasheet - Page 49

• 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

ST7FOXF1, ST7FOXK1, ST7FOXK2
6.5.5
Caution:
6.5.6
Prescaler register (PSCR)
Reset value: 0000 0000 (00h) for ST7FOXF1 and ST7FOXK1
Reset value: 0000 0011 (03h) for ST7FOXK2
Bits 7:5 = CK[2:0] internal RC Prescaler Selection
Table 11.
Bits 4:2 = Reserved, must be cleared.
Bits 1:0 = Must be set.
For ST7FOXF1 and ST7FOXK1 devices, PRSC[1:0] bits must be forced to 1 by software in
order to reduce current consumption.
Clock controller control/status register (CKCNTCSR)
Reset value: 0000 1001 (09h)
Bits 7:4 = Reserved, must be kept cleared.
Bit 3 = AWU_FLAG AWU Selection bit
CK2
CK2
0
7
These bits are set by software and cleared by hardware after a reset. These bits select
the prescaler of the internal RC oscillator. See
If the internal RC is used with a supply operating range below 3.3 V, a division ratio of
at least 2 must be enabled in the RC prescaler.
0
0
0
1
7
This bit is set and cleared by hardware.
0: No switch from AWU to RC requested
1: AWU clock activated and temporization completed
Internal RC prescaler selection bits
others
CK1
CK1
0
0
1
1
0
CK0
CK0
0
1
0
1
0
0
0
AWU_FLAG
Read/write
Read/write
0
Supply, reset and clock management
Table
RC_FLAG
11.
f
f
f
f
f
RC/16
RC/2
RC/4
RC/8
OSC
f
0
RC
0 or 1
0
RC/AWU
0 or 1
0
0
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