tc59ym916bkg24a ETC-unknow, tc59ym916bkg24a Datasheet - Page 48

• Manufacturer Part Number: tc59ym916bkg24a
• Description: The Second Generation 512-megabit Xdrtm Dram
• Manufacturer: ETC-unknow

(after SDI had previously been sampled one). This interval (measured in t
[k] of the XDR DRAM device along the serial interface bus. In this example, k is equal to 4.
after its SDI input is sampled zero.
(t
will drive its SDO to zero around the subsequent edge (S
will drive its SDO to zero around the subsequent edge (S
contains a state machine which measures the interval t
both sampled zero, and uses this value to set the SID [5:0] field of the SID (Serial Identification) register. This
value allows directed read and write transactions to be made to the individual XDR DRAM devices.
XDR DRAM [k] will see its RST input sampled zero at S
This is because each XDR DRAM device will drive its SDO output zero around the SCK edge a time t
In other words, the XDR DRAM [0] device will see RST and SDI both sampled zero on the same edge S
The XDR DRAM [1] device will see SDI sampled zero on edge S
The XDR DRAM [2] device will see SDI sampled zero on edge S
This continues until the last XDR DRAM device drives the SRD input of the controller. Each XDR DRAM device
Table 9 summarizes the range of the timing parameters used for initialization by the serial interface bus.
RST-SDI, 00
t
t
t
t
t
RST, 10
RST-SDO, 11
RST, SDI, 00
SDI-SDO, 00
RST-SCK
Symbol
will be 0 × t
Number of cycles between RST being sampled one and RST
being sampled zero.
Number of cycles between RST being sampled one and SDO
being driven to one.
Number of cycles between RST being sampled zero (after
being sampled one for t
being sampled zero. This will be equal to the index [k] of the
XDR DRAM device along the serial interface bus.
Number of cycles between SDI being sampled one (after RST
has been sampled one for t
then sampled zero) and SDO being driven to zero.
The number of SCK falling edges after the first SCK falling
edge in which RST is sampled one.
CYC, SCK
Table 9. Initialization Timing Parameters
units), and will drive its SDO to zero around the subsequent edge (S
RST, 10, MIN
Parameter
RST, 10, MIN
TC59YM916BKG24A,32A,32B,40B,32C,40C
or more cycles) and SDI
or more cycles and is
RST − SDI, 00
14
15
12
).
).
, and will then see its SDI input sampled zero at S
13
14
(t
(t
between the edges in which RST and SDI are
RST-SDI, 00
RST-SDI, 00
CYC, SCK
Min
20
2
1
0
1
will be 1 × t
will be 2 × t
units) will be equal to the index
Max
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CYC, SCK
CYC, SCK
t
t
t
t
t
CYC,SCK
CYC,SCK
CYC,SCK
CYC,SCK
CYC,SCK
Unit
units), and
units), and
SDI-SDO,00
13
Rev 0.1
12
).
Figure (s)
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