參數(shù)資料
型號(hào)： GL600USB-A
廠商： Electronic Theatre Controls, Inc.
英文描述： USB MOUSE MICROCONTROLLER
中文描述： USB鼠標(biāo)單片機(jī)
文件頁(yè)數(shù)： 19/38頁(yè)
文件大小： 352K
代理商： GL600USB-A
19
06/19/2000
GL600USB/GL600USB-A/GL600USB-B
Revision 1.3
algorithm can detect any analog waveform from photo-sensor with amplitude larger than 1V. The ADC is a
high-speed converter. It takes less than 500ns to complete the conversion. Because GL600USB is running
at 3 MIPS for USB low speed application, only two dummy instructions should be added between write
PHSEL to read PHVAL.
4.5
GENERAL PURPOSE I/O PORTS
Interface with peripherals is conducted via up to 13 GPIO signals. These 13 signals are divided into two
ports: Port 1 and Port 2. Port 1 contains five lines (PORT1.0-PORT1.4) and Port 2 contains eight lines
(PORT2.0-PORT2.7). The Port 1 data register is located at data memory address 06h while the Port 2 data
register is located at data memory address 07h.
Port 2 is a low current port with analog input capability suitable for connecting photo-sensor. Port 1 is a
high current port capable of LED drive. Each GPIO line may include an internal pull-up or pull-down
resistor. Port 2’s internal pull-down resistor value can be programmed by option-code. Each output drive
has slew-rate control to reduce EMI. Please see the following table for details.
Driving capability
Pull-up resistor
PORT1.0
20 mA
PORT1.1
20 mA
PORT1.2
4 mA
10K
PORT1.3
4 mA
10K
PORT1.4
4 mA
10K
PORT2.0
4 mA
PORT2.1
4 mA
PORT2.2
4 mA
PORT2.3
4 mA
PORT2.4
4 mA
PORT2.5
4 mA
PORT2.6
4 mA
PORT2.7
4 mA
Note 1: The pull-down resistor can be configured as 4K
, 8K
, 16K
or 32K
by option-code.
Table 4-3 General Purpose I/O Port Summary
4.6
TIMER INTERRUPT
The Timer Interrupt is generated when the TIMER register overflows from FFh to 00h. This overflow sets
bit TMROF (INTEN<2>). The interrupt can be masked by clearing bit TMROEN (INTEN<5>). Bit
TMROF must be cleared in software by the Timer module interrupt service routine otherwise the Timer
Interrupt will not be generated again. If prescaler is disabled, the timer register will increase every
instruction cycle. If prescaler is enabled, its increment cycle depends on PS0~PS2 bits in PSCON register.
4.7
USB ENGINE
The USB module contains three functional blocks: a 3.3-volt regulator, a low-speed USB transceiver, and
the Serial Interface Engine (SIE). The following details the function of the regulator, transceiver, and SIE.
4.7.1
Voltage Regulator
The USB data lines are required by the USB specification to have a maximum output voltage between 2.8V
and 3.6V. Because the GL600USB is a low speed USB device, the D- lines also are required to have an
Pull-down resistor
4K
/8K
/16K
/32K
[1]
4K
/8K
/16K
/32K
4K
/8K
/16K
/32K
4K
/8K
/16K
/32K
4K
/8K
/16K
/32K
4K
/8K
/16K
/32K
4K
/8K
/16K
/32K
4K
/8K
/16K
/32K
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