LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 169
LSI53C825AJ
Manufacturer Part Number
LSI53C825AJ
Description
Manufacturer
LSI
Datasheet
1.LSI53C825AJ.pdf
(306 pages)
Specifications of LSI53C825AJ
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Register: 0x47 (0xC7)
General Purpose Pin Control (GPCNTL)
Read/Write
This register is used to determine if the pins controlled by the
Purpose (GPREG)
correspond to bits [4:0] in the
the bits are enabled as inputs, an internal pull-up is also enabled.
ME
FE
R
GPIO[4:2]
GPIO[1:0]
Operating Registers
ME
7
0
FE
6
0
Master Enable
The internal bus master signal is presented on GPIO1 if
this bit is set, regardless of the state of bit 1 (GPIO1_EN).
Fetch Enable
The internal opcode fetch signal is presented on GPIO0
if this bit is set, regardless of the state of bit 0
(GPIO0_EN).
Reserved
GPIO4_EN–GPIO2_EN (GPIO Enable)
General purpose control bits, corresponding to bits [4:2]
in the
59, and 57. GPIO4 powers up as a general purpose
output, and GPIO[3:2] power-up as general purpose
inputs.
GPIO1_EN–GPIO0_EN (GPIO Enable)
These bits power-up set, causing the GPIO1 and GPIO0
pins to become inputs. Clearing these bits causes
GPIO[1:0] to become outputs.
register are inputs or outputs. Bits [4:0] in GPCNTL
General Purpose (GPREG)
R
5
x
General Purpose (GPREG)
4
0
GPIO[4:2]
1
2
1
register and pins 60,
register. When
1
1
GPIO[1:0]
General
0
1
[4:2]
[1:0]
4-81
7
6
5
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