ETL9444 datasheet(24/27 Pages) STMICROELECTRONICS

24 / 27 page

OPTION LIST

The ETL9444/L9445 mask programmable options

are assigned numbers which correspond with the

ETL9444 pins.

The following is a list of ETL9444 options. When

specifying ETL9445 chip, Options 9, 10, 19, and 20

must all be set to zero. The options are programmed

at the same time as the ROM pattern to provide the

user with the hardware flexibility to interface to va-

rious I/O components using little or no external cir-

cuitry.

Option 1 = 0 : Ground Pin - no options available

Option 2 : CKO Output

= 0 : clock generator output to crystal/resonator

(0 not allowable value if option 3 = 3)

= 1 : pin is RAM power supply (VR) input

= 2 : general purpose input. load device to VCC

= 3 : general purpose input, Hi-Z

Option 3 : CKI Input

= 0 : oscillator input divided by 32 (2MHz max.)

= 1 : oscillator input divided by 16 (1MHz max.)

= 2 : oscillator input divided by 8 (500kHz max.)

= 3 : single-pin RC controlled oscillator divided

by 4

= 4 : oscillator input divided by 4 (Schmitt)

Option 4 : RESET Input

= 0 : load device to VCC

= 1 : Hi-Z input

Option 5 : L7

Driver

= 0 : Standard output

= 1 : Open-drain output

= 2 : High current LED direct segment drive

output

= 3 : High current TRI-STATE

® push-pull

output

= 4 : Low-current LED direct segment drive

output

= 5 : Low-current TRI-STATE® push-pull

output

Option 6 : L6 Driver

same as Option 5

Option 7 : L5 Driver

same as Option 5

Option 8 : L4 Driver

same as Option 5

Option 9 : IN1 Input

= 0 : load device to VCC

= 1 : Hi-Z input

Option 10 : IN2 Input

same as Option 9

Option 11 : VCC pin

= 0 : 4.5V to 6.3V operation

= 1 : 4.5V to 9.5V operation

Option 12 : L3 Driver

same as Option 5

Option 14 : L2 Driver

same as Option 5

Option 14 : L1 Driver

same as Option 5

Option 15 : L0 Driver

same as Option 5

Option 16 : SI Input

same as Option 9

Option 17 : SO Driver

= 0 : standard output

= 1 : open-drain output

= 2 : push-pull output

Option 18 : SK Driver

same as Option 17

Option 19 : IN0 Input

same as Option 9

Option 20 : IN3 Input

same as Option 9

Option 21 : G0 I/O Port

= 0 : very-high current standard output

= 1 : very-high current open-drain output

= 2 : high current standard output

= 3 : high current open-drain output

= 4 : standard LSTTL output (fanout = 1)

= 5 : open-drain LSTTL output (fanout = 1)

Option 22 : G1 I/O Port

same as Option 21

Option 23 : G2 I/O Port

same as Option 21

Option 24 : G3 I/O Port

same as Option 21

Option 25 : D3 Output

same as Option 21

Option 26 : D2 Output

same as Option 21

Option 27 : D1 Output

same as Option 21

Option 28 : D0 Output

same as Option 21

Option 29 : L Input Levels

= 0 : standard TTL input levels

(”0” = 0.8V, ”1” = 2.0V)

ETL9444/9445–ETL9344/9345

24/27

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