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GPBA01B Datasheet(PDF) 12 Page - Generalplus Technology Inc. |
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GPBA01B Datasheet(HTML) 12 Page - Generalplus Technology Inc. |
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12 / 29 page ![]() GPBA01B © Generalplus Technology Inc. Proprietary & Confidential 12 MAY 28, 2007 Version: 1.1 7.6.1. Bus extender pin assignment for 8 configurations Configuration Register $0023[7:5] PINs Name 000(I/O) 001(I/O) 010(32KB) 011(4MB) 100(1MB) 101(4MB) 110(1MB) 111(2MB) P00 I/O I/O I/O B0 B0 B0 B0 B0 P01 I/O I/O I/O B1 B1 B1 B1 B1 P02 I/O I/O I/O B2 B2 B2 B2 B2 P03 I/O I/O I/O B3 B3 B3 B3 B3 P04 I/O I/O I/O B4 B4 B4 B4 B4 P05 I/O I/O I/O B5 I/O B5 I/O B5 P06 I/O I/O I/O B6 I/O B6 CE2 CE2 P07 I/O I/O I/O I/O CE1 CE1 CE1 CE1 P10 I/O I/O A0 A0 A0 A0 A0 A0 P11 I/O I/O A1 A1 A1 A1 A1 A1 P12 I/O I/O A2 A2 A2 A2 A2 A2 P13 I/O I/O A3 A3 A3 A3 A3 A3 P14 I/O I/O A4 A4 A4 A4 A4 A4 P15 I/O I/O A5 A5 A5 A5 A5 A5 P16 I/O I/O A6 A6 A6 A6 A6 A6 P17 I/O I/O A7 A7 A7 A7 A7 A7 P20 I/O I/O A8 A8 A8 A8 A8 A8 P21 I/O I/O A9 A9 A9 A9 A9 A9 P22 I/O I/O A10 A10 A10 A10 A10 A10 P23 I/O I/O A11 A11 A11 A11 A11 A11 P24 I/O I/O A12 A12 A12 A12 A12 A12 P25 I/O I/O A13 A13 A13 A13 A13 A13 P26 I/O I/O A14 A14 A14 A14 A14 A14 P27 I/O I/O CE0 CE0 CE0 X CE0 X OSCO/ OE OSCO OSCO OE OE OE OE OE OE P55/ WE LOW HIGH WE WE WE WE WE WE Total I/O Available 25 25 8 1 2 0 1 0 No. of Memories available 0 0 1 1 2 1 3 2 Total memory size 0 0 32KB 4MB 2MB 4MB 3MB 4MB The memory is divided into banks, 32KB per bank. banks are address by B6-B0, while A14-A0 are offset address of bank. ITEM Description Memo B6-B0 Memory extender: Bank selection pin A14-A0 Memory extender: Address pin to access 32KB memory in a bank CE2 , CE1, CE0 Memory extender: Chip enable pin X Memory extender: Don’t use. I/O I/O extender: Pins can be configured as input or output O I/O extender: Output pin only OSCO I/O extender: Crystal output P55 I/O extender: When CFG=0 output Low, when CFG=1 output High |
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