K1C6416B2D-BI70
| Model | K1C6416B2D-BI70 |
| Description | Memory IC, 4MX16, CMOS, PBGA54 |
| PDF file | Total 50 pages (File size: 1M) |
| Chip Manufacturer | SAMSUNG |
K1C6416B2D
Software Access
UtRAM2
Software access of the registers uses a sequence of asynchronous READ and asynchronous WRITE operations. The contents of
the configuration registers can be modified and all registers can be read using the software sequence. The configuration registers
are loaded using a four-step sequence consisting of two asynchronous READ operations followed by two asynchronous WRITE
operations. The read sequence is virtually identical except that an asynchronous READ is performed during the fourth operation.
The address used during all READ and WRITE operations is the highest address of the device being accessed (3FFFFF); the
contents of this address are not changed by using this sequence. The data value presented during the third operation (WRITE) in
the sequence defines whether the BCR, RCR, or the DIDR is to be accessed. If the data is 0000h, the sequence will access the
RCR; if the data is 0001h, the sequence will access the BCR; if the data is 0002h, the sequence will access the DIDR. During the
fourth operation, DQ[15:0] transfer data in to or out of bits 15–0 of the registers. The use of the software sequence does not affect
the ability to perform the standard (CRE-controlled) method of loading the configuration registers. However, the software nature of
this access mechanism eliminates the need for CRE. If the software mechanism is used, CRE can simply be tied to VSS. The port
line often used for CRE control purposes is no longer required.
Load Configuration Register
Address
ADDRESS
Max
ADDRESS
Max
ADDRESS
Max
ADDRESS
Max
CS
OE
WE
LB/UB
DATA
XXXXh
XXXXh
RCR: 0000h
BCR: 0001h
CR Value In
Don’t Care
Read Configuration Register
Address
ADDRESS
Max
ADDRESS
Max
ADDRESS
Max
ADDRESS
Max
CS
OE
WE
LB/UB
DATA
XXXXh
XXXXh
RCR: 0000h
BCR: 0001h
DIDR: 0002h
CR Value Out
Don’t Care
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Revision 3.0
Sep 2007
