参数资料
型号: DSP56F802TA80E
厂商: Freescale Semiconductor
文件页数: 5/40页
文件大小: 0K
描述: IC DSP 60MHZ 16KB FLASH 32-LQFP
标准包装: 250
系列: 56F8xx
核心处理器: 56800
芯体尺寸: 16-位
速度: 80MHz
连通性: SCI
外围设备: POR,PWM,WDT
输入/输出数: 8
程序存储器容量: 20KB(10K x 16)
程序存储器类型: 闪存
RAM 容量: 2K x 16
电压 - 电源 (Vcc/Vdd): 3 V ~ 3.6 V
数据转换器: A/D 5x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 32-LQFP
包装: 托盘
JTAG/OnCE
56F802 Technical Data, Rev. 9
Freescale Semiconductor
13
2.8 JTAG/OnCE
Part 3 Specifications
3.1 General Characteristics
The 56F802 is fabricated in high-density CMOS with 5-volt tolerant TTL-compatible digital inputs. The
term “5-volt tolerant” refers to the capability of an I/O pin, built on a 3.3V compatible process technology,
to withstand a voltage up to 5.5V without damaging the device. Many systems have a mixture of devices
designed for 3.3V and 5V power supplies. In such systems, a bus may carry both 3.3V and 5V- compatible
I/O voltage levels (a standard 3.3V I/O is designed to receive a maximum voltage of 3.3V
± 10% during
normal operation without causing damage). This 5V-tolerant capability therefore offers the power savings
of 3.3V I/O levels while being able to receive 5V levels without being damaged.
Absolute maximum ratings given in Table 3-1 are stress ratings only, and functional operation at the
maximum is not guaranteed. Stress beyond these ratings may affect device reliability or cause permanent
damage to the device.
Table 2-10 JTAG/On-Chip Emulation (OnCE) Signals
No. of
Pins
Signal
Name
Signal
Type
State During
Reset
Signal Description
1
TCK
Input
(Schmitt)
Input, pulled
low internally
Test Clock Input—This input pin provides a gated clock to synchronize the
test logic and shift serial data to the JTAG/OnCE port. The pin is connected
internally to a pull-down resistor.
1
TMS
Input
(Schmitt)
Input, pulled
high internally
Test Mode Select Input—This input pin is used to sequence the JTAG TAP
controller’s state machine. It is sampled on the rising edge of TCK and has an
on-chip pull-up resistor.
Note:
Always tie the TMS pin to VDD through a 2.2K resistor.
1
TDI
Input
(Schmitt)
Input, pulled
high internally
Test Data Input—This input pin provides a serial input data stream to the
JTAG/OnCE port. It is sampled on the rising edge of TCK and has an on-chip
pull-up resistor.
1
TDO
Output
Tri-stated
Test Data Output—This tri-statable output pin provides a serial output data
stream from the JTAG/OnCE port. It is driven in the Shift-IR and Shift-DR
controller states, and changes on the falling edge of TCK.
1
TRST
Input
(Schmitt)
Input, pulled
high internally
Test Reset—As an input, a low signal on this pin provides a reset signal to the
JTAG TAP controller. To ensure complete hardware reset, TRST should be
asserted at power-up and whenever RESET is asserted. The only exception
occurs in a debugging environment, since the OnCE/JTAG module is under
the control of the debugger. In this case it is not necessary to assert TRST
when asserting RESET. Outside of a debugging environment RESET should
be permanently asserted by grounding the signal, thus disabling the
OnCE/JTAG module on the device.
Note:
For normal operation, connect TRST directly to VSS. If the design is to be
used in a debugging environment, TRST may be tied to VSS through a 1K resistor.
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