Sharp LC-37XD1E, Service Manual

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LC-37XD1E/RU
5 – 21
13. IC4201/4202: RH-IXB742WJZZQ
64Mb- SDRAM
14. IC4203: RH-IXB921WJZZ
16Mbit Flash Memory
Pin No. Pin Name I/O Pin Function
38 CLK I Active on the positive going edge to sample all inputs.
19 CS I
Disables or enables device operation by masking or enabling all inputs except
CLK,CKE and DQM.
37 CKE I
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.
22-26,
29-35
A0-A11 I
Row/column addresses are multiplexed on the same pins.
Row address: RA0-RA11, Column address: CA0-CA8
20, 21 BA0-BA1 I
Selects bank to be activated during row address latch time.
Selects bank for read/write during column address latch time.
18 RAS I
Latches row address on the positive going edge of the CLK with RAS low.
Eanbles row acccess <FmSdata>[amp ] precharge.
17 CAS I
Latches column addresses on the positive going edge of the CLK with CAS low.
Enables column access.
16 WE I
Enables write operation and row precharge.
Latches data in starting from CAS, WE active.
15,39 DQM I/O
Makes data output Hi-Z, tsHZ after the clock and masks the output. Blocks data
input when DQM active.
2,4,5,7,8,10,11,13,42,44,45,
47,48,50,51,53
DQ0-X15 I/O
Data input/output are mutiplexed on the same pins
(X16;DQ0-15)
1,14,27,28,41,54 VDD/VSS --- Power and ground for the input buffers and the core logic.
3,6,9,12,43,46,49,52, VDDQ/VSSQ ---
Lsolated power supply and ground for the output buffers to provide improved
noise immunity.
40 N.C/RFU --- This pin is recommended to be left No Connection on the device.
Pin No. Pin Name I/O Pin Function
1-10,
16-25,
48,13
A2-A22 I 22 Address Input.
29,31,33,35,38,40,42,44 DQ0-DQ7 I/O 8 Data Input/Output.
30,32,34,
36,39,41,43
DQ8-DQ14 I/O Data Input/Output.
45 DQ15A-1 I/O Data Input/Output or Address Input.
26 E I Chip Enable.
28 G O Output Enable
11 W I Write Enable.
12 RP I Reset/Block Temporary Unprotect
15 RB O Read/Busy Output.
47 BYTE I Byte/Word Organization Select.
37 Vcc - Supply Voltage.
27,46 Vss - Ground.
N.C. - Not Connected Internally.