ST7260E1 STMicroelectronics, ST7260E1 Datasheet - Page 128

• 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

Electrical characteristics
16.9.3
Table 75.
128/139
Symbol
f
f
Rx
Tx
Communication frequency 8 MHz
Figure 66. USB: data signal rise and fall time
Table 74.
1.
SCI - serial communications interface
Subject to general operating condition for V
Refer to I/O port characteristics for more details on the input/output alternate function
characteristics (RDI and TDO).
SCI characteristics
For more detailed information, please refer to Chapter 7 (Electrical) of the USB specification (version 1.1).
Parameter
V
VCRS
SS
Data Lines
Symbol
Differential
V
t
CRS
rfm
t
t
r
f
USB: low-speed electrical characteristics
Driver characteristics:
Rise time
Fall Time
Rise/ Fall Time
matching
Output signal
Crossover Voltage
tf
f
CPU
Parameter
Crossover
points
Accuracy
Standard
~0.16%
vs.
Conditions
tr
Conventional Mode
TR (or RR)=128, PR=13
TR (or RR)= 32, PR=13
TR (or RR)= 16, PR=13
TR (or RR)= 8, PR=13
TR (or RR)= 4, PR=13
TR (or RR)= 16, PR= 3
TR (or RR)= 2, PR=13
TR (or RR)= 1, PR=13
DD
CL=600 pF
CL=600 pF
CL=50 pF
CL=50 pF
Conditions
, f
CPU
Prescaler
tr/tf
, and T
(1)
(1)
(1)
(1)
A
unless otherwise specified.
Min
1.3
75
75
80
Standard
10400
19200
38400
1200
2400
4800
9600
300
Max
300
300
120
2.0
~10416.67
~19230.77
~38461.54
~1201.92
~2403.84
~4807.69
~9615.38
Baud
~300.48
Rate
ST7260xx
Unit
ns
ns
ns
ns
%
V
Unit
Hz