参数资料
型号: TMS320C2812ZHHS
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 150 MHz, OTHER DSP, PBGA179
封装: LEAD FREE, BGA-179
文件页数: 63/156页
文件大小: 1826K
代理商: TMS320C2812ZHHS
Electrical Specifications
155
April 2001 Revised October 2005
SPRS174M
6.34
Migrating From F281x Devices to C281x Devices
The migration issues to be considered while migrating from the F281x devices to C281x devices are as
follows:
The 1K OTP memory available in F281x devices has been replaced by 1K ROM C281x devices.
Power sequencing is not needed for C281x devices. In other words, 3.3-V and 1.8-V (or 1.9-V) can ramp
together. C281x can also be used on boards that have F281x power sequencing implemented; however,
if the 1.8-V (or 1.9-V) rail lags the 3.3-V rail, the GPIO pins are undefined until the 1.8-V rail reaches at
least 1 V.
Current consumption differs for F281x and C281x devices for all four possible modes. See the appropriate
electrical section for exact numbers.
The VDD3VFL pin is the 3.3-V flash core power pin in F281x devices but is a VDDIO pin in C281x devices.
F281x and C281x devices are pin-compatible and code-compatible; however, they are electrically
different with different EMI/ESD profiles. Before ramping production with c281x devices, evaluate
performance of the hardware design with both devices
Addresses 0x3D7BFC through 0x3D7BFF in the OTP and addresses 0x3F7FF2 through 0x3F7FF5 in the
main ROM array are reserved for ROM part-specific information and are not available for user
applications.
The ADC module in C281x devices can operate at 24.9k bias on ADCRESEXT pin for the full range
125MHz. While migrating the F281x designs to C281x, use a 24.9k resistor for biasing the ADC.
The paged and random wait-state specifications for the flash and ROM parts are different. While migrating
from flash to ROM parts, the same wait-state values must be used for best performance compatibility (for
example, in applications that use software delay loops or where precise interrupt latencies are critical).
For errata applicable to 281x devices, see the TMS320F2810, TMS320F2811, TMS320F2812,
TMS320C2810, TMS320C2811, TMS320C2812 Digital Signal Processors Silicon Errata (literature number
SPRZ193).
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