Sharp DX-SX1H Service Manual page 60

DX-SX1H
IC805 RH-iX1539GEZZ: Flash ROM (IX1539GE) (1/2)
Pin No. Terminal Name Input/Output
1-3 A15-A13
4-8 A12-A8
9*, 10* NC
11 WR
12 /RP
13 VPP
14 /WP
15 RY/BY
16,17 A18, A17
18-25 A7-A0
26 /CE
27 GND
28 /OE
29 DQ0
30 DQ8
31 DQ1
32 DQ9
33 DQ2
34 DQ10
35 DQ3
36 DQ11
37 VCC
38 DQ4
39 DQ12
40 DQ5
41 DQ13
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Input Block select addresses: Select 1/32 erase block. These addresses are latched during data entry,
erase and lock block.
Input Word select addresses: Select one word in 1.6k byte block.
These addresses are latched during data entry.
— Not used
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.
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.
— Device power supply: 5.0 V
— Write/Erase power supply: 5.0±0.5V is applied during the writing/erasing operation.
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.
Input Block select addresses: Select 1/32 erase block. These addresses are latched during data entry,
erase and lock block.
Input Word select addresses: Select one word in 1.6k byte block.
These addresses are latched during data entry.
Input Chip enable: Makes control logic, input buffer, decoder, and sense amplifier of the device active.
Only when /CE is Low, chip becomes active.
— Ground
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.
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
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
— Device power supply: 5.0±0.5V
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
Function
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