Functional Block Diagram - Harman Kardon AVR 1600 Service Manual

AVR1600
ESMT

FUNCTIONAL BLOCK DIAGRAM

CLK
ADD
PIN FUNCTION DESCRIPTION
Pin
CLK
System Clock
CS
Chip Select
CKE
Clock Enable
A0 ~ A10/AP
Address
BA
Bank Select Address
RAS
Row Address Strobe
CAS Column Address Strobe
WE Write Enable
L(U)DQM
Data Input / Output Mask
DQ0 ~ 15
Data Input / Output
VDD/VSS
Power Supply/Ground
VDDQ/VSSQ
Data Output Power/Ground
No Connection/
N.C/RFU
Reserved for Future Use
Elite Semiconductor Memory Technology Inc.
Bank Select
LCKE
LRAS LCBR
LWE
Timing Register
CLK CKE
CS RAS
Name
Active on the positive going edge to sample all inputs.
Disables or enables device operation by masking or enabling all inputs except
CLK, CKE and L(U)DQM.
Masks system clock to freeze operation from the next clock cycle.
CKE should be enabled at least one cycle prior to new command.
Disable input buffers for power down in standby.
Row / column addresses are multiplexed on the same pins.
Row address : RA0 ~ RA10, column address : CA0 ~ CA7
Selects bank to be activated during row address latch time.
Selects bank for read/write during column address latch time.
Latches row addresses on the positive going edge of the CLK with RAS low.
Enables row access & precharge.
Latches column addresses on the positive going edge of the CLK with
Enables column access.
Enables write operation and row precharge.
Latches data in starting from CAS , WE active.
Makes data output Hi-Z, tSHZ after the clock and masks the output.
Blocks data input when L(U)DQM active.
Data Input Register
512K x 16
512K x 16
Column Decoder
Latency & Burst Length
Programming Register
LCAS
LWCBR
L(U)DQM
CAS WE
CAS low.
Data inputs/outputs are multiplexed on the same pins.
Power and ground for the input buffers and the core logic.
Isolated power supply and ground for the output buffers to provide improved
noise immunity.
This pin is recommended to be left No Connection on the device.
124
M12L16161A
LWE
LDQM
DQi
LDQM
Input Function
Publication Date : May. 2005
harman/kardon