参数资料
型号: PIC14000T-20/SS
厂商: Microchip Technology
文件页数: 64/153页
文件大小: 0K
描述: IC MCU OTP 4KX14 A/D 28SSOP
标准包装: 2,100
系列: PIC® 14
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C
外围设备: POR,温度传感器,WDT
输入/输出数: 20
程序存储器容量: 7KB(4K x 14)
程序存储器类型: OTP
RAM 容量: 192 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 6 V
数据转换器: 斜率 A/D
振荡器型: 内部
工作温度: 0°C ~ 70°C
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
包装: 带卷 (TR)
PIC14000
DS40122B-page 18
Preliminary
1996 Microchip Technology Inc.
4.2.2.2
OPTION REGISTER
The OPTION register (Address 81h) is a readable and
writable register which contains various control bits to
congure the TMR0/WDT prescaler, TMR0, and the
weak pull-ups on PORTC<5:0>. Bit 6 is reserved.
Note:
To achieve a 1:1 prescaler assignment,
assign the prescaler to the WDT (PSA=1)
FIGURE 4-4:
OPTION REGISTER
RCPU: PORTC pull-up enable
PSA
PS2 PS1
PS0
R/W
R/W R/W
R/W
bit0
RCPU
r
T0CS T0SE
bit7
PS2
PS1
PS0
PSA: Prescaler assignment bit
T0SE: TMR0 source edge
T0CS: TMR0 clock source
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
Reserved. This bit should be programmed as a ‘1’. Use of this bit as
Address:
81h
POR value:
FFh
W:
Writable
R:
Readable
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 RC3/T0CKI pin
0 = Increment on low-to-high transition on RC3/T0CKI pin
1 = Transition on RC3/T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
1 = PORTC pull-ups are disabled overriding any port latch value (RC<5:0> only)
0 = PORTC pull-ups are enabled by individual port-latch values (RC<5:0>)
PS2:PS0
11
1
Register:
OPTION
general purpose read/write is not recommended since this may affect
upward compatibility with future products.
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