參數(shù)資料
型號(hào)： W78ERD2A40DN
廠商： WINBOND ELECTRONICS CORP
元件分類： 微控制器/微處理器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDIP40
封裝： DIP-40
文件頁數(shù)： 25/72頁
文件大?。?/td> 606K
代理商： W78ERD2A40DN
W78ERD2
Publication Release Date: April 20, 2005
- 25 -
Revision A4
F/W Flash Control
Bit:
7
6
5
4
3
2
1
0
0
WFWIN
NOE
NCE
CTRL3
CTRL2
CTRL1 CTRL0
Mnemonic: SFRCN Address: C7h
BIT
NAME
FUNCTION
7
-
Reserve
6
WFWIN
On-chip Flash EPROM bank select for in-system programming.
0: 64K bytes Flash EPROM bank is selected as destination for re-
programming.
1: 4K bytes Flash EPROM bank is selected as destination for re-
programming.
5
4
OEN
CEN
Flash EPROM output enable.
Flash EPROM chip enable.
3~0
CTRL[3:0]
The flash control signals
Timer 2 Control
Bit:
7
6
5
4
3
2
1
0
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2
CP/RL2
Mnemonic: T2CON Address: C8h
BIT
7
NAME
FUNCTION
TF2
Timer 2 overflow flag: This bit is set when Timer 2 overflows. It is also set when
the count is equal to the capture register in down count mode. It can be set only
if RCLK and TCLK are both 0. It is cleared only by software. Software can also
set or clear this bit.
Timer 2 External Flag: A negative transition on the T2EX pin (P1.1) or timer 2
underflow/overflow will cause this flag to set based on the CP/RL2, EXEN2 and
DCEN bits. If set by a negative transition, this flag must be cleared by software.
Setting this bit in software or detection of a negative transition on T2EX pin will
force a timer interrupt if enabled.
6
EXF2
5
RCLK
Receive clock Flag: This bit determines the serial port time-base when receiving
data in serial modes 1 or 3. If it is 0, then timer 1 overflow is used for baud rate
generation, else timer 2 overflow is used. Setting this bit forces timer 2 in baud
rate generator mode.
4
TCLK
Transmit clock Flag: This bit determines the serial port time-base when
transmitting data in mode 1 and 3. If it is set to 0, the timer 1 overflow is used to
generate the baud rate clock, else timer 2 overflow is used. Setting this bit
forces timer 2 in baud rate generator mode.
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