参数资料
型号: PIC16C765-I/L
厂商: Microchip Technology
文件页数: 123/165页
文件大小: 0K
描述: IC MCU OTP 8KX14 USB 44PLCC
产品培训模块: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
标准包装: 27
系列: PIC® 16C
核心处理器: PIC
芯体尺寸: 8-位
速度: 24MHz
连通性: SCI,UART/USART,USB
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: 14KB(8K x 14)
程序存储器类型: OTP
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 4.35 V ~ 5.25 V
数据转换器: A/D 8x8b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
产品目录页面: 636 (CN2011-ZH PDF)
配用: AC164309-ND - MODULE SKT FOR PM3 44PLCC
ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
444-1001-ND - DEMO BOARD FOR PICMICRO MCU
PIC16C745/765
DS41124C-page 60
Preliminary
2000 Microchip Technology Inc.
10.5
USB Register Map
The USB Control Registers, Buffer Descriptors and
Buffers are located in Bank 3.
10.5.1
CONTROL AND STATUS REGISTERS
The USB module is controlled by 7 registers, plus
those that control each endpoint and endpoint/
direction buffer.
10.5.1.1
USB Interrupt Register (UIR)
The USB Interrupt Status Register (UIR) contains flag
bits for each of the interrupt sources within the USB.
Each of these bits are qualified with their respective
interrupt enable bits (see the Interrupt Enable Register
UIE). All bits of the register are logically OR’ed
together to form a single interrupt source for the micro-
processor interrupt found in PIR1 (USBIF). Once an
interrupt bit has been set, it must be cleared by writing
a zero.
REGISTER 10-1:
USB INTERRUPT FLAGS REGISTER (UIR: 190h)
U-0
R/C-0
STALL
UIDLE
TOK_DNE ACTIVITY
UERR
USB_RST
R = Readable bit
C = Clearable bit
U = Unimplemented bit,
read as ‘0’
-n = Value at POR reset
bit7
bit0
bit 7-6:
Unimplemented: Read as '0'
bit 5:
STALL: A STALL handshake was sent by the SIE
bit 4:
UIDLE: This bit is set if the USB has detected a constant idle on the USB bus signals for 3 ms. The idle
timer is reset by activity on the USB bus. Once a IDLE condition has been detected, the user may wish
to place the USB module in SUSPEND by setting the SUSPEND bit in the UCTRL register.
bit 3:
TOK_DNE: This bit is set when the current token being processed is complete. The microprocessor
should immediately read the USTAT register to determine the Endpoint number and direction used for
this token. Clearing this bit causes the USTAT register to be cleared or the USTAT holding register to be
loaded into the STAT register if another token has been processed.
bit 2:
ACTIVITY: Activity on the D+/D- lines will cause the SIE to set this bit. Typically this bit is unmasked
following detection of SLEEP. Users must enable the activity interrupt in the USB Interrupt Register
(UIE: 191h) prior to entering suspend.
bit 1:
UERR: This bit is set when any of the error conditions within the ERR_STAT register has occurred. The
MCU must then read the ERR_STAT register to determine the source of the error.
bit 0:
USB_RST: This bit is set when the USB has decoded a valid USB Reset. This will inform the MCU to
write 00h into the address register and enable endpoint 0. USB_RST is set once a USB Reset has been
detected for 2.5 microseconds. It will not be asserted again until the USB Reset condition has been
removed, and then reasserted.
Note 1: Bits can only be modified when UCTRL.SUSPND = 0.
745cov.book Page 60 Wednesday, August 2, 2000 8:24 AM
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