参数资料
型号: PIC16C64A-04I/PT
厂商: Microchip Technology
文件页数: 97/126页
文件大小: 0K
描述: IC MCU OTP 2KX14 PWM 44TQFP
标准包装: 160
系列: PIC® 16C
核心处理器: PIC
芯体尺寸: 8-位
速度: 4MHz
连通性: I²C,SPI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 33
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: OTP
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 6 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-TQFP
包装: 托盘
72
AT90S/LS4433
1042H–AVR–04/03
I/O Ports
All AVR ports have true Read-Modify-Write functionality when used as general digital
I/O ports. This means that the direction of one port pin can be changed without uninten-
tionally changing the direction of any other pin with the SBI and CBI instructions. The
same applies for changing drive value (if configured as output) or enabling/disabling of
pull-up resistors (if configured as input).
Port B
Port B is a 6-bit bi-directional I/O port.
Three I/O memory address locations are allocated for the Port B, one each for the Data
Register – PORTB, $18($38), Data Direction Register – DDRB, $17($37), and the Port
B Input Pins – PINB, $16($36). The Port B Input Pins address is read only, while the
Data Register and the Data Direction Register are read/write.
All port pins have individually selectable pull-up resistors. The Port B output buffers can
sink 20 mA and thus drive LED displays directly. When pins PB0 to PB7 are used as
inputs and are externally pulled low, they will source current if the internal pull-up resis-
tors are activated.
The Port B pins with alternate functions are shown in Table 23.
When the pins are used for the alternate function, the DDRB and PORTB Registers
have to be set according to the alternate function description.
Port B Data Register – PORTB
Port B Data Direction Register
– DDRB
Port B Input Pins Address –
PINB
Table 23. Port B Pin Alternate Functions
Port Pin
Alternate Functions
PB0
ICP (Timer/Counter1 Input Capture Pin)
PB1
OC1 (Timer/Counter1 Output Compare Match Output)
PB2
SS (SPI Slave Select Input)
PB3
MOSI (SPI Bus Master Output/Slave Input)
PB4
MISO (SPI Bus Master Input/Slave Output)
PB5
SCK (SPI Bus Serial Clock)
Bit
76543210
$18 ($38)
PORTB5
PORTB4
PORTB3
PORTB2
PORTB1
PORTB0
PORTB
Read/Write
R
R/W
Initial Value
00000000
Bit
76543210
$17 ($37)
DDB5
DDB4
DDB3
DDB2
DDB1
DDB0
DDRB
Read/Write
R
R/W
Initial Value
00000000
Bit
76543210
$16 ($36)
PINB5
PINB4
PINB3
PINB2
PINB1
PINB0
PINB
Read/Write
RRRRRRRR
Initial Value
0
N/A
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