89C51IC2-CM ATMEL [ATMEL Corporation], 89C51IC2-CM Datasheet - Page 119
89C51IC2-CM
Manufacturer Part Number
89C51IC2-CM
Description
8-bit Flash Microcontroller with 2-wire Interface
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.89C51IC2-CM.pdf
(146 pages)
- Current page: 119 of 146
- Download datasheet (2Mb)
Autobaud Performances
Command Data Stream
Protocol
4301A–8051–01/04
Table 91. Autobaud Performances
Frequency (MHz)
Baudrate (bit/s)
2400
4800
9600
19200
38400
57600
115200
Frequency (MHz)
Baudrate (bit/s)
2400
4800
9600
19200
38400
57600
115200
1.8432
OK
OK
OK
OK
10
OK
OK
OK
OK
-
-
-
-
-
-
The ISP feature allows a wide range of baud rates in the user application. It is also
adaptable to a wide range of oscillator frequencies. This is accomplished by measuring
the bit-time of a single bit in a received character. This information is then used to pro-
gram the baud rate in terms of timer counts based on the oscillator frequency. The ISP
feature requires that an initial character (an uppercase U) be sent to the AT89C51IC2 to
establish the baud rate. Table 91 shows the autobaud capability.
All commands are sent using the same flow. Each frame sent by the host is echoed by
the bootloader.
11.0592
OK
OK
OK
OK
OK
OK
OK
OK
2
-
-
-
-
-
-
2.4576
OK
OK
OK
OK
OK
12
OK
OK
OK
OK
OK
-
-
-
-
14.318
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
3
-
-
3.6864
14.746
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
OK
OK
OK
16
OK
OK
OK
OK
OK
OK
4
-
-
-
-
-
OK
OK
OK
OK
20
OK
OK
OK
OK
OK
OK
5
-
-
-
-
OK
OK
OK
OK
OK
24
OK
OK
OK
OK
OK
OK
6
-
-
-
7.3728
AT89C51IC2
26.6
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
OK
OK
OK
OK
8
119
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