Z86D99 ZILOG [Zilog, Inc.], Z86D99 Datasheet - Page 77
Z86D99
Manufacturer Part Number
Z86D99
Description
Low-Voltage Micro controllers with ADC
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.Z86D99.pdf
(102 pages)
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PS003807-1002
Bit
Bit/Field
R/W
Reset
R = Read, W = Write, X = Indeterminate
Bit
Position
76543210
Bit
Bit/Field
R/W
Reset
R = Read, W = Write, X = Indeterminate
Bit
Position
7654__10
(by bit)
____32__
Note:
Port 5 Control and Mode Registers (P5 and P5M)
Port 5 is a general-purpose 8-bit, bidirectional I/O port, as shown in Table 30.
Each of the eight Port 5 I/O lines can be independently programmed as either
input or output using the Port 5 Mode Register (see Table 31.)
Table 30. P5 Register [Group/Bank 00h, Register 5 (R5)]
Table 31. P5M Register (Group/Bank 0Fh, Register 4)
A bit set to a 1 in the P5M Register configures the corresponding bit in Port 5 as
an input, while a bit set to 0 configures an output line.
Regardless of how P5M bits 2 and 3 are set, P52 and P53 are
always in input mode.
7
Port 5 Data
R/W
X
Bit/Field
Port 5 Data
7
P57M
R/W
1
Bit/Field
Port 5 Mode
Select
P53, P52
Mode Select
P
6
R/W
X
6
P56M
R/W
1
R
E
L
5
R/W
X
R/W
R/W
5
P55M
R/W
1
R/W
R/W
R/W
I
M
Z86D990/Z86D991 OTP and Z86L99X ROM
4
R/W
X
Value
Data
4
P54M
R/W
1
Value
1
0
1
I
Low-Voltage Microcontrollers with ADC
N
A
3
R/W
X
Description
Port 5 Input/Output Register
3
P53M
R/W
1
Description
Input
Output
Input
Regardless of what is written to this
pin, P53 and P52 are always in input
mode.
R
Y
2
R/W
X
2
P52M
R/W
1
1
R/W
X
1
P51M
R/W
1
0
R/W
X
0
P50M
R/W
1
70
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