參數(shù)資料
型號(hào)： 79RC32K438-300BB
廠商： Integrated Device Technology, Inc.
英文描述： IDTTM InterpriseTM Integrated Communications Processor
中文描述： IDTTM InterpriseTM集成通信處理器
文件頁(yè)數(shù)： 36/59頁(yè)
文件大?。?/td> 644K
代理商： 79RC32K438-300BB
36 of 59
May 25, 2004
IDT 79RC32438
Figure 22 JTAG AC Timing Waveform
The IEEE 1149.1 specification requires that the JTAG and EJTAG TAP controllers be reset at power-up whether or not the interfaces are used for
a boundary scan or a probe. Reset can occur through a pull-down resistor on JTAG_TRST_N if the probe is not connected. However, on-chip pull-up
resistors are implemented on the RC32438 due to an IEEE 1149.1 requirement. Having on-chip pull-up and external pull-down resistors for the
JTAG_TRST_N signal requires special care in the design to ensure that a valid logical level is provided to JTAG_TRST_N, such as using a small
external pull-down resistor to ensure this level overrides the on-chip pull-up. An alternative is to use an active power-up reset circuit for
JTAG_TRST_N, which drives JTAG_TRST_N low only at power-up and then holds JTAG_TRST_N high afterwards with a pull-up resistor.
Figure 23 shows the electrical connection of the EJTAG probe target system connector.
Figure 23 Target System Electrical EJTAG Connection
Tpw_16d
Tdz_16c
Tdo_16c
Thld_16e
Tsu_16e
Thld_16b
Tsu_16b
Thld_16b
Tsu_16b
Tlow_16a
Tper_16a
Thigh_16a
JTAG_TCK
JTAG_TDI
JTAG_TMS
EJTAG_TMS
JTAG_TDO
JTAG_TRST_N
GND
GND
GND
GND
GND
1
TRST*
TDI
TDO
TMS
TCK
RST*
DINT
no connect
JTAG_TRST_N
JTAG_TDI
JTAG_TDO
EJTAG_TMS
JTAG_TCK
GND
VDD
GND
VccIO voltage
reference
P
P
Series-res.
COLDRSTN
or RSTN
Target System
Reset Circuit
P
Other reset
sources
RC32438
VSENSE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
79RC32K438-300BBG 功能描述:處理器 - 專(zhuān)門(mén)應(yīng)用 RoHS:否 制造商:Freescale Semiconductor 類(lèi)型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:1 GHz 指令/數(shù)據(jù)緩存: 數(shù)據(jù) RAM 大小:128 KB 數(shù)據(jù) ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MAPBGA-432
79RC32K438300BBI 制造商:IDT 制造商全稱(chēng):Integrated Device Technology 功能描述:IDTTM InterpriseTM Integrated Communications Processor
79RC32T335-133DH 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:MICROPROCESSOR|32-BIT|QFP|208PIN|PLASTIC
79RC32T335-133DHI 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:MICROPROCESSOR|32-BIT|QFP|208PIN|PLASTIC
79RC32T335-150DH 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:MICROPROCESSOR|32-BIT|QFP|208PIN|PLASTIC
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