參數(shù)資料
型號(hào)： MB91151APMC-G
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： RISC MICROCONTROLLER, PQFP144
封裝： 20 X 20 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LFQFP-144
文件頁(yè)數(shù)： 70/96頁(yè)
文件大?。?/td> 2300K
代理商： MB91151APMC-G
MB91151A Series
72
DS07-16312-2E
■ SERIAL START UP
The serial startup mode is the internal RAM (2 KB) serial write or RAM program startup mode using the internal
dedicated ROM. While this mode executes communication through the UART channel 1 built in this model, it
can also serve for data transfer to external flash memory. Either synchronous or asynchronous communication
can be selected by setting the relevant pin. For asynchronous communication, a baud rate of 9600 bps can be
used either at a machine clock frequency of 25 MHz (oscillation frequency of 12.5 MHz) orat a machine clock
frequency of 33 MHz (oscillation frequency of 16.5 MHz) selectively.
(Note that serial startup using asynchronous communication cannot be performed at a machine clock frequency
of 36 MHz at an oscillation frequency of 18 MHz.)
Communication specifications
(1) Asynchronous communication at a machine clock frequency of 33 MHz
The device performs serial communication in the asynchronous (normal) mode of UART channel 1.
The baud rate is 9600 bps at a machine clock frequency of 33 MHz (based on a 16.5 MHz external crystal
oscillator) .
Serial mode settings are : a data length of 8 bits, a stop bit length of 1 bit, no parity, and LSB-first transfer.
(2) Asynchronous communication at a machine clock frequency of 25 MHz
The device performs serial communication in the asynchronous (normal) mode of UART channel 1.
The baud rate is 9600 bps at a machine clock frequency of 25 MHz (based on a 12.5 MHz external crystal
oscillator) .
Serial mode settings are : a data length of 8 bits, a stop bit length of 1 bit, no parity, and LSB-first transfer.
(3) Synchronous communication
The device performs serial communication in the synchronous (normal) mode of UART channel 1.
The baud rate can be set freely depending on the external clock input (the baud rate is determined directly by
the external clock frequency) .
The maximum input frequency of the external clock is the peripheral operating clock frequency devided by 8.
(The peripheral operating clock setting is the fastest PLL frequency.)
Serial mode settings are : a data length of 8 bits, no parity, and LSB-first transfer.
In each fo these modes, the devices passes the following three items of download information data to the FR,
byte by byte in sequence from the high-order byte :
1. Command data (00H)
2. 4 bytes of the download destination RAM address (00080400H to 000807FFH)
3. 4 bytes specifying the number of bytes download (up to 000003FFH)
Then the device gives resulting SUM check data (the lower eight bits extracted from these data items added
together) , entering the RAM download routine.
The device then passes the data to be downloaded to RAM to the FR, byte by byte in sequence from the high-
order byte, and the resulting SUM check data as well in the same way. Upon completion of transfer, a jump to
RAM takes place and the downloaded program is executed.
Method of setting
External pin name
MD2
MD1
MD0
PG5
PG4
PG3
Asynchronous communication
machine clock 33 MHz
1
01
00
Asynchronous communication
machine clock 25 MHz
1
01
Synchronous communication
1
0
1
0
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