ST10F272M-4T3 STMicroelectronics, ST10F272M-4T3 Datasheet - Page 151

• Manufacturer Part Number: ST10F272M-4T3
• Description: MCU 16BIT 256K FLASH 144-LQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F272M-4T3

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: ASC, CAN, EBI/EMI, I²C, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 20K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 144-MQFP, 144-PQFP
• Processor Series: ST10F27x
• Core: ST10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

ST10F272M
Note:
24.8.14
24.8.15
Note:
Figure 49. 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 40 MHz
is used, 50% duty cycle is granted (low phase = high phase = 12.5 ns); when for instance
20 MHz is used, a 25 % duty cycle can be accepted (minimum phase, high or low, again
equal to 12.5 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 to be computed.
Table 69.
External memory bus timing
The following sections include the external memory bus timings. The given values are
computed for a maximum CPU clock of 40 MHz.
All external memory bus timings and SSC timings listed in the following tables are granted
by design characterization and not fully tested in production.
ALE extension
Memory cycle time wait states
Memory tri-state time
Description
Memory cycle variables
t
1
V
IH2
Symbol
t
t
t
A
C
F
t
2
t
3
TCL x [ALECTL]
2TCL x (15 - [MCTC])
2TCL x (1 - [MTTC])
t
V
OSC
IL2
Electrical characteristics
Values
t
4
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