st62t25c STMicroelectronics, st62t25c Datasheet - Page 17

• Manufacturer Part Number: st62t25c
• Description: 8-bit Otp/eprom Mcus With A/d Converter, Oscillator Safeguard, Safe Reset And 28 Pins
• Manufacturer: STMicroelectronics

CLOCK SYSTEM (Cont’d)
Figure 11. Clock Circuit Block Diagram
Figure 12. Maximum Operating Frequency (f
Notes:
1. In this area, operation is guaranteed at the
quartz crystal frequency.
2. When the OSG is disabled, operation in this
area is guaranteed at the crystal frequency. When
the OSG is enabled, operation in this area is guar-
anteed at a frequency of at least f
3. When the OSG is disabled, operation in this
OSCILLATOR
MAIN
8
7
6
5
4
3
2
1
Maximum FREQU ENCY (MHz)
2.5
3
4
OSG Min.
LFAO
OSG
3.6
SUPPLY VOLTAGE (V
Main Oscillator off
MAX
4
) versus Supply Voltage (V
area is guaranteed at the quartz crystal frequency.
When the OSG is enabled, access to this area is
prevented. The internal frequency is kept a f
4. When the OSG is disabled, operation in this
area is not guaranteed
When the OSG is enabled, access to this area is
prevented. The internal frequency is kept at f
4.5
M
U
X
DD
)
3
2
1
5
f
OSG
f
OSG
f
INT
Min
5.5
ST62T15C/T25C/E25C
DD
: 12
: 13
: 1
)
6
POR
Core
TIMER 1
Watchdog
VR01807
OSG.
OSG.
17/70
17