DX-SX1H
– 60 –
IC805 RH-iX1539GEZZ: Flash ROM (IX1539GE) (1/2)
1-3
A15-A13
Input
Block select addresses: Select 1/32 erase block. These addresses are latched during data entry,
erase and lock block.
4-8
A12-A8
Input
Word select addresses: Select one word in 1.6k byte block.
These addresses are latched during data entry.
9*, 10*
NC
—
Not used
11
WR
Input
Write enable: Controls access to command user interface, to data cue register and to address
cue latch. At Low, WR is active to input address and data at leading edge.
12
/RP
Input
Reset/power-down: By setting /RP at Low, control circuit is initialized when supplying power.
When supplying/breaking power, /RP pin is maintained at Low to protect data.
If /RP is at Low, device is in condition of deep power down.
To return from the deep power down, 480ns is required.
When pin /RP is at Low, all chip operation is interrupted and reset.
After return, device reads array.
13
VPP
—
Device power supply: 5.0 V
14
/WP
—
Write/Erase power supply: 5.0
±
0.5V is applied during the writing/erasing operation.
15
RY/BY
Output
Ready/Busy: Outputs the condition of the internal write state machine. "Low" shows the write
state machine is in operation. When the machine is waiting for the next instruction to operate,
interrupting erasing, or in deep power-down condition, RY/BY pin is in the float condition.
16,17
A18, A17
Input
Block select addresses: Select 1/32 erase block. These addresses are latched during data entry,
erase and lock block.
18-25
A7-A0
Input
Word select addresses: Select one word in 1.6k byte block.
These addresses are latched during data entry.
26
/CE
Input
Chip enable: Makes control logic, input buffer, decoder, and sense amplifier of the device active.
Only when /CE is Low, chip becomes active.
27
GND
—
Ground
28
/OE
Input
Output enable: By setting /OE at Low, data are output from pin DQ.
If /OE is set at High, pin DP becomes in the float condition.
29
DQ0
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.
30
DQ8
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
31
DQ1
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.
32
DQ9
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
33
DQ2
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.
34
DQ10
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
35
DQ3
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.
36
DQ11
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
37
VCC
—
Device power supply: 5.0
±
0.5V
38
DQ4
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.
39
DQ12
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
40
DQ5
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.
41
DQ13
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
Pin No. Terminal Name Input/Output
Function
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
