参数资料
型号: TMR320F2811ZHHS
厂商: Texas Instruments, Inc.
元件分类: 数字信号处理
英文描述: TMS320R2811, TMS320R2812 Digital Signal Processors
中文描述: TMS320R2811,TMS320R2812数字信号处理器
文件页数: 112/147页
文件大小: 2021K
代理商: TMR320F2811ZHHS
Electrical Specifications
112
June 2004
SPRS257
6.21
External Interface (XINTF) Timing
Each XINTF access consists of three parts: Lead, Active, and Trail. The user configures the Lead/Active/Trail
wait states in the XTIMING registers. There is one XTIMING register for each XINTF zone. Table 6
24 shows
the relationship between the parameters configured in the XTIMING register and the duration of the pulse in
terms of XTIMCLK cycles.
Table 6
24. Relationship Between Parameters Configured in XTIMING and Duration of Pulse
DESCRIPTION
DURATION (ns)
X2TIMING = 0
XRDLEAD x t
c(XTIM)
(XRDACTIVE + WS + 1) x t
c(XTIM)
XRDTRAIL x t
c(XTIM)
XWRLEAD x t
c(XTIM)
(XWRACTIVE + WS + 1) x t
c(XTIM)
XWRTRAIL x t
c(XTIM)
X2TIMING = 1
(XRDLEAD x 2) x t
c(XTIM)
(XRDACTIVE x 2 + WS + 1) x t
c(XTIM)
(XRDTRAIL x 2) x t
c(XTIM)
(XWRLEAD x 2) x t
c(XTIM)
(XWRACTIVE x 2 + WS + 1) x t
c(XTIM)
(XWRTRAIL x 2) x t
c(XTIM)
LR
AR
TR
LW
AW
TW
Lead period, read access
Active period, read access
Trail period, read access
Lead period, write access
Active period, write access
Trail period, write access
t
c(XTIM)
Cycle time, XTIMCLK
WS refers to the number of wait states inserted by hardware when using XREADY. If the zone is configured to ignore XREADY (USEREADY = 0),
then WS = 0.
Minimum wait state requirements must be met when configuring each zone’s XTIMING register. These
requirements are in addition to any timing requirements as specified by that device’s data sheet. No internal
device hardware is included to detect illegal settings.
If the XREADY signal is ignored (USEREADY = 0), then:
1.
Lead:
LR
t
c(XTIM)
LW
t
c(XTIM)
These requirements result in the following XTIMING register configuration restrictions
§
:
XRDLEAD
1
§
No hardware to detect illegal XTIMING configurations
XRDACTIVE
0
XRDTRAIL
0
XWRLEAD
1
XWRACTIVE
0
XWRTRAIL
0
X2TIMING
0, 1
Examples of valid and invalid timing when not sampling XREADY
§
:
XRDLEAD
0
1
XRDACTIVE
0
0
XRDTRAIL
0
0
XWRLEAD
0
1
XWRACTIVE
0
0
XWRTRAIL
0
0
X2TIMING
0, 1
0, 1
Invalid
Valid
§
No hardware to detect illegal XTIMING configurations
A
相关PDF资料
PDF描述
TMR320F2812PBKA TMS320R2811, TMS320R2812 Digital Signal Processors
TMR320F2812PGFA TMS320R2811, TMS320R2812 Digital Signal Processors
TMR320R2811ZHHS TMS320R2811, TMS320R2812 Digital Signal Processors
TMP320C2811PBKA TMS320R2811, TMS320R2812 Digital Signal Processors
TMP320C2811PGFA TV 22C 22#22D SKT RECP R&D
相关代理商/技术参数
参数描述
TMR320F2812GHHA 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors
TMR320F2812GHHQ 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors
TMR320F2812GHHS 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors
TMR320F2812PBKA 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors
TMR320F2812PBKQ 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors