参数资料
型号: MTA81010-XTI/P
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 8/76页
文件大小: 745K
代理商: MTA81010-XTI/P
MTA81010
DS39005D-page 16
1995 Microchip Technology Inc.
3.2.4
OPTION REGISTER
The OPTION register is a 6-bit wide, write-only register
which contains various control bits to configure the
TMR0/WDT prescaler, the external INT interrupt and
TMR0.
By executing the OPTION instruction, the contents of
the W register will be transferred to the OPTION
register. A RESET sets the OPTION register to all '1's.
FIGURE 3-10: OPTION REGISTER
T0CS
T0SE
PSA
PS2 PS1
PS0
U
W
bit0
bit7
PS2
PS1
PS0
PSA: Prescaler assignment bit
T0SE: TMR0 source edge select bit
T0CS: TMR0 clock source bit
PRESCALER VALUE
0
1
0
1
0
1
0
1
0
1
0
1
0
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
Unimplemented: Read as ‘0’
Address:
N/A
POR value:
FFh
W:
Write only
U:
Unimplemented.
Read as '0'
TMR0 RATE
WDT RATE
1 = Prescaler assigned to the WDT
0 = Prescaler assigned to TMR0
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
PS2:PS0
11
1
Register:
OPTION
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