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Z86C08 Scheda tecnica(PDF) 21 Page - Zilog, Inc.

Il numero della parte Z86C08
Spiegazioni elettronici  CMOS 8-BIT LOW-COST 1K/2K-ROM MICROCONTROLLERS
PDF  34 Pages
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Produttore elettronici  ZILOG [Zilog, Inc.]
Homepage  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z86C08 Scheda tecnica(HTML) 21 Page - Zilog, Inc.

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Z86C04/C08
Zilog
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers
DS97DZ80502
P R E L I M I N A R Y
21
1
FUNCTIONAL DESCRIPTION
RESET. Upon power-up the Power-On Reset circuit waits
for T
POR ms, plus 18 clock cycles, and then starts program
execution at address%000C (Hex) (Figure 10). The device
control registers’ reset value is shown in Table 2.
Figure 9. Internal Reset Configuration
Table 1. Z86C04/C08 & C05/C07 Control Registers
Reset Condition
Addr.
Reg.
D7
D6
D5
D4
D3
D2
D1
D0
Comments
03H (3)*
Port 3
U
UUUU
U
U
U
02H (2)*
Port 2
U
UUUU
U
U
U
00H (0)*
Port 0
U
UUUU
U
U
U
FFH(255)
SPL
0
0000
0
0
0
FFH (254)
GPR
0
0000
0
0
0
FDH (253)
RP
0
0000
0
0
0
FCH (252)
FLAGS
U
UUUU
U
U
U
FBH (251)
IMR
0
UUUU
U
U
U
FAH (250)
IRQ
U
U
0
0
0
0
0
0
IRQ3 is used
for positive
edge detection
F9H (249)
IPR
U
UUUU
U
U
U
F8H (248)*
P01M
U
U
U
0
U
U
0
1
F7H (247)*
P3M
U
UUUU
U
0
0
F6H (246)*
P2M
1
1111
1
1
1
Inputs after
reset
F5H (245)
PRE0
U
UUUU
U
U
0
F4H (244)
T0
U
UUUU
U
U
U
F3H (243)
PRE1
U
UUUU
U
0
0
F2H (242)
T1
U
UUUU
U
U
U
F1H (241)
TMR
0
0000
0
0
0
Note: *Registers are not reset after a STOP-Mode Recovery using P27 pin.
A subsequent reset will cause these control registers to be re-configured as shown in
Table 2 and the user must avoid bus contention on the port pins or it may affect device reliability.
POR
(Cold Start)
P27
(Stop Mode)
Delay Line
TPOR ms
18 CLK
Reset Filter
Chip
Reset
XTAL OSC
INT OSC



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