ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 206
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ST10F276Z5
Manufacturer Part Number
ST10F276Z5
Description
16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
Manufacturer
STMicroelectronics
Datasheet
1.ST10F276Z5.pdf
(239 pages)
Specifications of ST10F276Z5
Single Voltage Supply
5V ±10% (embedded regulator for 1.8 V core supply)
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Electrical characteristics
Note:
23.8.16
206/239
Table 104. External clock drive timing
1. The minimum value for the XTAL1 signal period is considered as the theoretical minimum. The real
2. 4-12 MHz is the input frequency range when using an external clock source. 64 MHz can be applied with
3. The input clock signal must reach the defined levels V
Figure 56. External clock drive XTAL1
When Direct Drive is selected, an external clock source can be used to drive XTAL1. The
maximum frequency of the external clock source depends on the duty cycle: When 64 MHz
is used, 50% duty cycle is granted (low phase = high phase = 7.8 ns); when for instance
32 MHz is used, a 25% duty cycle can be accepted (minimum phase, high or low, again
equal to 7.8 ns).
Memory cycle variables
The tables below use three variables which are derived from the BUSCONx registers and
represent the special characteristics of the programmed memory cycle. The following table
describes how these variables are computed.
Table 105. Memory cycle variables
t
t
t
t
t
t
t
t
Symbol
OSC
1
2
3
4
A
C
F
minimum value depends on the duty cycle of the input clock signal.
an external clock source only when Direct Drive mode is selected: In this case, the oscillator amplifier is
bypassed so it does not limit the input frequency.
SR
SR
SR
SR
Symbol
SR
XTAL1 period
High time
Low time
Rise time
Fall time
Parameter
ALE extension
Memory cycle time wait states
Memory tri-state time
(3)
(3)
(3)
(3)
(1) (2)
t
1
Description
15.625
Min.
Direct drive
f
6
–
CPU
V
= f
IH2
XTAL
Max.
–
–
2
t
2
t
3
IL2
Direct drive with
and V
f
Min.
83.3
CPU
3
–
prescaler
t
V
OSC
IH2
IL2
= f
TCL x [ALECTL]
2TCL x (15 - [MCTC])
2TCL x (1 - [MTTC])
.
XTAL
Max.
250
–
2
/ 2
f
Min.
83.3
CPU
Values
6
–
PLL usage
= f
t
4
XTAL
Max.
ST10F276Z5
250
–
2
x F
Unit
ns
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