ST7260E1 STMicroelectronics, ST7260E1 Datasheet - Page 28

• Manufacturer Part Number: ST7260E1
• Description: LOW SPEED USB 8-BIT MCU FAMILY WITH UP TO 8K FLASH/ROM AND SERIAL COMMUNICATION INTERFACE (SCI)
• Manufacturer: STMicroelectronics

Specifications of ST7260E1

• 4 Or 8 Kbytes Program Memory: high density Flash (HDFlash), or FastROM with readout and write protection

Reset and clock management
7.3.2
28/139
Table 9.
1. R
External clock
An external clock may be applied to the OSCIN input with the OSCOUT pin not connected,
as shown on
input. The equivalent specification of the external clock source should be used instead of
t
Figure 13. External clock source connections
Figure 14. Crystal/ceramic resonator
OXOV
SMAX
(see
C
R
Symbol
C
OSCOUT
SMAX
is the equivalent serial resistor of the crystal (see crystal specification).
OSCIN
R
Section 16.5: Clock and timing
P
Recommended values for 24 MHz crystal resonator
Figure
(1)
13. The t
OXOV
C
1-10 MΩ
OSCIN
56pF
56pF
20 Ω
specifications do not apply when using an external clock
OSCIN
EXTERNAL
CLOCK
OSCIN
characteristics).
R
P
OSCOUT
OSCOUT
NC
1-10 MΩ
Values
47pF
47pF
25 Ω
C
OSCOUT
1-10 MΩ
22pF
22pF
70 Ω
ST7260xx