ZiLOG Z8

I/O Ports
9-10
R248 P01M
Port 0-1 Mode Register
(% F8; Write Only)
P0
4
-P0
7
MODE:]
OUTPUT = 00 -.-J
INPUT = 01
A
12
-A
15
= 1X
EXTERNAL MEMORY TIMING
NORMAL = 0
*EXTENDED = 1
I [ P08oP~, ~u"T~~T
01 = INPUT
1X = As-All
. ST~:KESX;LEERCJ~~N
1 = INTERNAL
P1
o
-P1
7
MODE
00
= BYTE OUTPUT
01 = BYTE INPUT
10
= ADo-AD7
11 = HIGH·IMPEDANCE ADo-AD7,
AS, OS, R/iii, As-All, A12-A15
·ALWAYS EXTENDED TIMING AFTER RESET EXCEPT Z8682
Figure 9-19. Z8601/11 Port 0 and 1 Reset
R248 P01M
Port 0-1 Mode Register
(% F8; Write Only)
P0
4
-P0
7
MODE:]
OUTPUT = 00 -.-J
INPUT = 01
A
12
-A
15
= 1X
EXTERNAL MEMORY TIMING
NORMAL = 0
*EXTENDED = 1
c:
POO-P03 MODE
L 00 = OUTPUT
01 = INPUT
1X = As-All
STACK SELECTION
o = EXTERNAL
1
= INTERNAL
·ALWAYS EXTENDED TIMING AFTER RESET EXCEPT Z8682
Figure 9-20. Z8681 Ports 0 and 1 Reset
R248 P01M
Port 0-1 Mode Register
(% F8; Write Only)
P0
4
-P0
7
MODE:]
OUTPUT = 00 -.-J
INPUT = 01
A
12
-A
15
= 1X
EXTERNAL MEMORY TIMING
NORMAL = 0
EXTENDED = 1
I [ ""8oP~, ~u"T~~T
01 = INPUT
1X = As-All
STACK SELECTION
o = EXTERNAL
1
= INTERNAL
P1
o
-P1
7
MODE
L-____ 10 = ADo-AD7
Figure 9-21. Z8682 Ports 0 and 1 Reset
3047·006,3047-008,3047-054