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参数资料
| 型号： | Z8913820FSC |
| 厂商： | ZILOG INC |
| 元件分类： | 数字信号处理 |
| 英文描述： | 8-BIT, 20.48 MHz, MIXED DSP, PQFP100 |
| 封装： | QFP-100 |
| 文件页数： | 30/65页 |
| 文件大小： | 2054K |
| 代理商： | Z8913820FSC |
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Z89138/Z89139
Voice Processing Controllers
Zilog
36
P R E L I M I N A R Y
DS97TAD0201
Z8 MCU FUNCTIONAL DESCRIPTION (Continued)
Port Configuration Register (PCON). The PCON regis-
ter configures the comparator output on Port 3. The PCON
register (Figure 25) is located in the Expanded Register
File at Bank F, location 00H.
Comparator Output Port 3 (D0). Bit 0 controls the com-
parator use in Port 3. A 1 in this location brings the com-
parator outputs to P34 and P35, and a 0 releases the Port
to its standard I/O configuration.
Port 4 and 5 Configuration Register (P45CON). The
P45CON register configures Port 4 and Port 5, individual-
ly, to open-drain or push-pull active. This register is located
in the Expanded Register File at Bank F, location 06H.
Port 4 Open-Drain (D0). Port 4 can be configured as an
open-drain by resetting this bit (D0 = 0) or configured as
push-pull active by setting this bit (D0 = 1). The default val-
ue is 1.
Port 5 Open-Drain (D4). Port 5 can be configured as an
open-drain by resetting this bit (D4 = 0) or configured as
push-pull active by setting this bit (D4 = 1). The default val-
ue is 1.
Power-On Reset (POR). A timer circuit clocked by a ded-
icated on-board RC oscillator is used for the Power-On Re-
set (POR) timer function. The POR time allows VCC and
the oscillator circuit to stabilize before instruction execu-
tion begins.
The POR timer circuit is a one-shot timer triggered by one
of three conditions:
1.
Power fail to Power OK status;
2.
Stop-Mode Recovery (if D5 of SMR=1);
3.
WDT time-out.
The POR time is a nominal 5 ms. Bit 5 of the STOP Mode
register determines whether the POR timer is bypassed af-
ter Stop-Mode Recovery (typical for external clock, RC/LC
oscillators).
HALT. HALT turns off the internal CPU clock, but not the
XTAL oscillation. The counter/timers and external inter-
rupts IRQ0, IRQ1, IRQ2, and IRQ3 remain active. The de-
vices are recovered by interrupts, either externally or inter-
nally generated.
STOP. This instruction turns off the internal clock and ex-
ternal crystal oscillation. It reduces the standby current to
20
A or less. The STOP Mode is terminated by a reset
only, either by WDT time-out, POR, SMR, or external re-
set. This causes the processor to restart the application
program at address 000CH. In order to enter STOP (or
HALT) Mode, it is necessary to first flush the instruction
pipeline to avoid suspending execution in mid-instruction.
To do this, the user must execute a NOP (opcode=FFH)
immediately before the appropriate Sleep instruction. For
example:,
Figure 25. Port Conguration Register (PCON)
D7 D6
D5
D4
D3
D2
D1 D0
PCON (F) %00
R Always "1"
W 0 P34,P37 Standard output
1 P34,P37 Comparator output
R Always "1"
W No effect
Note: Reset condition is 11111110
FF
NOP
; clear the pipeline
6F
STOP
; enter STOP Mode
or
FF
NOP
; clear the pipeline
7F
HALT
; enter HALT Mode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| Z8913829ASC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| Z8913829FSC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| Z89139 | 制造商:ZILOG 制造商全称:ZILOG 功能描述:Voice Processing Controllers |
| Z8913920ASC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| Z8913920FSC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
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