参数资料
型号: KSZ8863FLLI
厂商: Micrel Inc
文件页数: 2/106页
文件大小: 0K
描述: IC ETHERNET SWITCH 3PORT 48-LQFP
标准包装: 250
控制器类型: 以太网开关控制器
接口: MII
电源电压: 1.8V,2.5V,3.3V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 托盘
配用: 576-3866-ND - BOARD EVALUATION FOR KSZ8863FLL
其它名称: 576-3750
PIC16C72 Series
DS39016A-page 10
Preliminary
1998 Microchip Technology Inc.
2.2.2.2
OPTION_REG REGISTER
The OPTION_REG register is a readable and writable
register which contains various control bits to congure
the TMR0 prescaler/WDT postscaler (single assign-
able register known also as the prescaler), the External
INT Interrupt, TMR0, and the weak pull-ups on PORTB.
FIGURE 2-4:
OPTION_REG REGISTER (ADDRESS 81h)
Note:
To achieve a 1:1 prescaler assignment for
the TMR0 register, assign the prescaler to
the Watchdog Timer.
R/W-1
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
R
= Readable bit
W = Writable bit
U
= Unimplemented bit,
read as ‘0’
- n = Value at POR reset
bit7
bit0
bit 7:
RBPU: PORTB Pull-up Enable bit
1 = PORTB pull-ups are disabled
0 = PORTB pull-ups are enabled by individual port latch values
bit 6:
INTEDG: Interrupt Edge Select bit
1 = Interrupt on rising edge of RB0/INT pin
0 = Interrupt on falling edge of RB0/INT pin
bit 5:
T0CS: TMR0 Clock Source Select bit
1 = Transition on RA4/T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
bit 4:
T0SE: TMR0 Source Edge Select bit
1 = Increment on high-to-low transition on RA4/T0CKI pin
0 = Increment on low-to-high transition on RA4/T0CKI pin
bit 3:
PSA: Prescaler Assignment bit
1 = Prescaler is assigned to the WDT
0 = Prescaler is assigned to the Timer0 module
bit 2-0: PS2:PS0: Prescaler Rate Select bits
000
001
010
011
100
101
110
111
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
Bit Value
TMR0 Rate
WDT Rate
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