Sharp DX-SX1H Service Manual page 61

IC805 RH-iX1539GEZZ: Flash ROM (IX1539GE) (2/2)
Pin No. Terminal Name Input/Output
42 DQ6
43 DQ14
44 DQ7
45 DQ15
46 GND
47 NC
48 A16
INPUT
BUFFER
Input/Output Lower byte data input/output: Data and command input during cycle of writing command user
interface. Memory array, identifier, and status data output when reading various data.
Float condition in case of chip non-select or output disable.
Input/Output Upper byte data input/output: The function is the same as shown in case of the lower byte data
input/output above. Operating only in x16 mode. Floating in x 8 mode. DQ15/A-1: address
Input/Output Lower byte data input/output: Data and command input during cycle of writing command user
interface. Memory array, identifier, and status data output when reading various data.
Float condition in case of chip non-select or output disable.
Input/Output Upper byte data input/output: The function is the same as shown in case of the lower byte data
input/output above. Operating only in x16 mode. Floating in x 8 mode. DQ15/A-1: address
— Ground
— Not used
Input Block select addresses: Select 1/32 erase block. These addresses are latched during data entry,
erase and lock block.
DQ8-15
OUTPUT
BUFFER
Y-
DECODER
Figure 61 BLOCK DIAGRAM OF IC
Function
DQ0-7
OUTPUT INPUT
BUFFER BUFFER
ID
REGISTOR
CSR
ESRs
DATA
COMPARATOR
Y GATE/DETECTION
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INPUT
BUFFER
INPUT/
OUTPUT
BYTE#
LOGIC
CE#
OE#
WE#
RP#
RY/BY#
PROGRAM
VPP
ERASE
VOLTAGE
SWITCH
VCC
GND
DX-SX1H