z86e54 ZiLOG Semiconductor, z86e54 Datasheet - Page 32

• Manufacturer Part Number: z86e54
• Description: Z8 512 Byte Otp Mcu
• Manufacturer: ZiLOG Semiconductor

Functional Description
PS020102-1003
FFh
FDh
FCh
FBh
FAh
F9h
Address Register D7 D6 D5 D4 D3 D2 Dl D0
RESET
(Stop-Mode Recovery)
(Cold Start)
The following special functions are incorporated into the Z8
the standard Z8 core architecture and to provide the user with increased design
flexibility.
A RESET can be triggered in the following two ways:
•
•
Power-On Reset (POR)
Upon power-up, the Power-On Reset circuit waits for T
cycles, then starts program execution at address 000ch (Figure 12). The Z8
trol registers’ reset value is indicated in Z8
SPL
RP
FLAGS
IMR
IRQ
IPR
POR
P27
Power-On Reset
Watch-Dog Timer Reset
0
0
U
0
U
U
Table 14. Z8
Figure 12.Internal Reset Configuration
0
0
U
U
U
U
0
0
U
U
0
U
Reset Condition
®
0
0
U
U
0
U
Control Registers Reset Values*
INT OSC
Delay Line
T
POR
0
0
U
U
0
U
ms
0
0
U
U
0
U
0
0
U
U
0
U
0
0
U
U
0
U
®
Control Registers Reset Values*.
XTAL OSC
Reset Filter
IRQ3 is used for positive edge
detection
18 CLK
PQR
Comments
Z8
®
®
ms, plus 18 clock
devices to enhance
512 Byte OTP MCU
Reset
Chip
Z86E54
®
con-
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