W83791SD Information Storage Devices, Inc, W83791SD Datasheet - Page 13

• Manufacturer Part Number: W83791SD
• Description: Programmable Speech Synthesizer With 133 Int/ext Event Triggers
• Manufacturer: Information Storage Devices, Inc

7.11 Disable Abnormal BEEP Control Register  Index 4Dh (Bank 0)
Power on default [7:0]: 0001_0101; Reset by MR.
7.12 High Byte Access  Index 4Eh (Bank 0)
Power on default [7:0] 1000_0000b; Reset by MR.
7.13 Winbond Vendor ID  Index 4Fh (Bank 0)
Power on default: A3h
7.14 Winbond Test Register  Index 50h - 55h (Bank 0)
These Registers is reserved for Winbond test only. Users do not use these registers.
7.15 Chip ID -- Index 58h (Bank 0)
Power on default: 71h
7
6:0
7
6:0
7:0
7-0
BIT
BIT
BIT
HBACS
Reserved
DIS_ABN
Reserved
CHIPID
Vendor ID
NAME
NAME
NAME
NAME
Read Only
ATTRIBUTE
ATTRIBUTE
ATTRIBUTE
ATTRIBUTE
Read Only
R/W
R/W
Winbond Chip ID. Read this register will return 71h.
Disable power-on abnormal the monitor voltage including
Vcore, and +3.3V. If these voltages exceed the limit value, the
pin of BEEP (Open Drain) will drive 300Hz and 600Hz
frequency signal. Write 1, the frequency will be disabled.
Default 0. After power on, the system should set 1 to this bit to 1
in order to disable BEEP.
Reserved.
High byte access. Set to 1, access Register 4Fh high byte
register. Set to 0, access Register 4Fh low byte register.
Default 1.
Reserved
Vendor ID low byte if CR4E.bit7=0. Default A3h. Vendor ID high
byte if CR4E.bit7=1. Default 5Ch.
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W83791SD/W83791SG
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION