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LC-32DH57E-BK/RU-BK/S-BK
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2.8. IC3501, IC3502 (RH-iXC505WJQZQ)
2.8.1 Block Diagram
2.8.2 Pin Connections and short description
Pin No.
Pin Name
I/O
Pin Function
J8, K8
CK, CK#
I
Clock:
CK and CK# are differential clock inputs. All address and control input signals are sampled on the
crossing of the positive edge of CK and negative edge of CK#.
Output (read) data is referenced to the crossings of CK and CK# (both directions of crossing).
CK and CK# are differential clock inputs. All address and control input signals are sampled on the
crossing of the positive edge of CK and negative edge of CK#.
Output (read) data is referenced to the crossings of CK and CK# (both directions of crossing).
K2
CKE
I
Clock Enable:
CKE HIGH activates, and CKE Low deactivates, internal clock signals and device input buffers and
output drivers.
Taking CKE Low provides Precharge Power-Down and Self Refresh operation (all bank idle), or
Active Power-Down (row Active in any bank).
CKE is synchronous for power down entry and exit, and for self refresh entry. CKE is asynchro-
nous for self refresh exit.
After VREF has become stable during the power on and initialization sequence, it must be main-
tained for proper operation of the CKE receiver. For proper self-refresh entry and exit, VREF must
be maintained to this input.
CKE must be maintained high throughout read and write accesses. Input buffers, excluding CK,
CK#, ODT and CKE are disabled during power-down. Input buffers, excluding CKE are disabled
during self refresh.
CKE HIGH activates, and CKE Low deactivates, internal clock signals and device input buffers and
output drivers.
Taking CKE Low provides Precharge Power-Down and Self Refresh operation (all bank idle), or
Active Power-Down (row Active in any bank).
CKE is synchronous for power down entry and exit, and for self refresh entry. CKE is asynchro-
nous for self refresh exit.
After VREF has become stable during the power on and initialization sequence, it must be main-
tained for proper operation of the CKE receiver. For proper self-refresh entry and exit, VREF must
be maintained to this input.
CKE must be maintained high throughout read and write accesses. Input buffers, excluding CK,
CK#, ODT and CKE are disabled during power-down. Input buffers, excluding CKE are disabled
during self refresh.
L8
CS#
I
Chip Select:
All commands are masked when CS# is registered HIGH.
CS# provides for external bank selection on systems with multiple banks.
CS# is considered part of the command code.
All commands are masked when CS# is registered HIGH.
CS# provides for external bank selection on systems with multiple banks.
CS# is considered part of the command code.
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