參數(shù)資料
型號： TSC87251G2D-L16CE
廠商： Atmel
文件頁數(shù)： 77/77頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 32K OTP 16MHZ 44VQFP
標(biāo)準(zhǔn)包裝： 160
系列： 8x251
核心處理器： C251
芯體尺寸： 8/16-位
速度： 16MHz
連通性： EBI/EMI，I²C，Microwire，SPI，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 32KB（32K x 8）
程序存儲器類型： OTP
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： 0°C ~ 70°C
封裝/外殼： 44-LQFP
包裝： 托盤
9
AT/TSC8x251G2D
4135F–8051–11/06
T1:0
I/O
Timer 1:0 External Clock Inputs
When timer 1:0 operates as a counter, a falling edge on the T1:0 pin
increments the count.
–
T2
I/O
Timer 2 Clock Input/Output
For the timer 2 capture mode, T2 is the external clock input. For the Timer 2
clock-out mode, T2 is the clock output.
P1.0
T2EX
I
Timer 2 External Input
In timer 2 capture mode, a falling edge initiates a capture of the timer 2
registers. In auto-reload mode, a falling edge causes the timer 2 register to
be reloaded. In the up-down counter mode, this signal determines the
count direction: 1 = up, 0 = down.
P1.1
TXD
O
Transmit Serial Data
TXD outputs the shift clock in serial I/O mode 0 and transmits data in serial
I/O modes 1, 2 and 3.
P3.1
VDD
PWR
Digital Supply Voltage
Connect this pin to +5V or +3V supply voltage.
–
VPP
I
Programming Supply Voltage
The programming supply voltage is applied to this input for programming
the on-chip EPROM/OTPROM.
–
VSS
GND
Circuit Ground
Connect this pin to ground.
–
VSS1
GND
Secondary Ground 1
This ground is provided to reduce ground bounce and improve power
supply bypassing. Connection of this pin to ground is recommended.
However, when using the TSC80251G2D as a pin-for-pin replacement for a
8xC51 product, VSS1 can be unconnected without loss of compatibility.
Not available on DIP package.
–
VSS2
GND
Secondary Ground 2
This ground is provided to reduce ground bounce and improve power
supply bypassing. Connection of this pin to ground is recommended.
However, when using the TSC80251G2D as a pin-for-pin replacement for a
8xC51 product, VSS2 can be unconnected without loss of compatibility.
Not available on DIP package.
–
WAIT#
I
Real-time Synchronous Wait States Input
The real-time WAIT# input is enabled by setting RTWE bit in WCON
(S:A7h). During bus cycles, the external memory system can signal
‘system ready’ to the microcontroller in real time by controlling the WAIT#
input signal.
P1.6
WCLK
O
Wait Clock Output
The real-time WCLK output is enabled by setting RTWCE bit in WCON
(S:A7h). When enabled, the WCLK output produces a square wave signal
with a period of one half the oscillator frequency.
P1.7
WR#
O
Write
Write signal output to external memory.
P3.6
XTAL1
I
Input to the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to this
pin. If an external oscillator is used, its output is connected to this pin.
XTAL1 is the clock source for internal timing.
–
Table 2.
Product Name Signal Description (Continued)
Signal
Name
Type
Description
Alternate
Function
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