參數(shù)資料
型號(hào)： TMS416169P-60
廠商： Texas Instruments, Inc.
英文描述： 1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
中文描述： 1048576字由16位擴(kuò)充數(shù)據(jù)輸出高速DRAM等
文件頁(yè)數(shù)： 31/67頁(yè)
文件大?。?/td> 1464K
代理商： TMS416169P-60
TMS55160, TMS55161, TMS55170, TMS55171
262144 BY 16-BIT MULTIPORT VIDEO RAMS
SMVS464
–
MARCH1996
31
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251
–
1443
serial-read operation
The serial-read operation can be performed through the SAM port simultaneously and asynchronously with
DRAM operations except during transfer operations. Serial data is accessed from the SAM at the rising edge
of serial clock SC. SE low enables the outputs. SE high disables the outputs. Holding SE high does not disable
SC. The rising edge of SC automatically increments the internal serial-address counter regardless of the state
of SE. In full-register-transfer operations, the counter proceeds sequentially to the most significant bit (bit 255),
and then wraps around to the least significant bit (bit 0), as shown in Figure 25.
255
254
Tap
2
1
0
Figure 25. Serial-Pointer Direction for Serial Read
In split-register-transfer operations, serial data can be read out from the active half of SAM by clocking SC
starting at the tap point loaded by the preceding split-register-transfer cycle. The serial pointer then proceeds
sequentially to the most significant bit of the half, bit 127 or bit 255. If there is a split-register-transfer read to
the inactive half during this period, the serial pointer points next to the tap point location loaded by that
split-register-transfer (see Figure 26).
127
126
Tap
0
255
254
Tap
128
Figure 26. Serial Pointer for Split-Register Read
–
Case I
If there is no split-register transfer to the inactive half during this period, the serial pointer points to the next bit,
bit 128 or bit 0, respectively (see Figure 27).
127
126
Tap
0
255
254
Tap
128
Figure 27. Serial Pointer for Split-Register Read
–
Case II
split-register programmable stop point
The TMS551xx offers programmable stop-point mode for split-register-transfer read operation. This mode can
be used to improve 2-D drawing performance in a nonscanline data format.
In split-register-transfer read operations, the stop point is defined as a register location at which the serial output
stops coming from one half of the SAM and switches to the opposite half of the SAM. While in stop-point mode,
the SAM is divided into partitions whose length is programmed on row addresses A4
–
A7 in a CBR set (CBRS)
cycle. The last serial-address location of each partition is the stop point (see Figure 28).
255
128
0
127
Partition
Length
Stop
Points
Figure 28. Example of SAM With Partitions
相關(guān)PDF資料
PDF描述
TMS416169P-70 1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
TMS416169P-80 1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
TMS418169P-60 1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
TMS418169P-70 1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
TMS418169P-80 1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TMS416169P-70 制造商:TI 制造商全稱:Texas Instruments 功能描述:1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
TMS416169P-80 制造商:TI 制造商全稱:Texas Instruments 功能描述:1048576-WORD BY 16-BIT EXTENDED DATA OUT HIGH-SPEED DRAMS
TMS4161FML-15 制造商:Texas Instruments 功能描述:
TMS4164 DIE 制造商:Texas Instruments 功能描述:
TMS416400 制造商:TI 制造商全稱:Texas Instruments 功能描述:4194304-WORD BY 4-BIT HIGH-SPEED DRAMS
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