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| 型號(hào)： | S-35390A-T8T1 |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | REAL TIME CLOCK, PDSO8 |
| 封裝： | TSSOP-8 |
| 文件頁(yè)數(shù)： | 29/48頁(yè) |
| 文件大?。?/td> | 542K |
| 代理商： | S-35390A-T8T1 |
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S1C88816 TECHNICAL MANUAL
EPSON
27
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (Oscillation Circuits and Operating Mode)
5.3 Oscillation Circuits and
Operating Mode
5.3.1 Configuration of oscillation circuits
The S1C88816 is twin clock system with two
internal oscillation circuits (OSC1 and OSC3).
The OSC1 oscillation circuit generates the 32.768
kHz (Typ.) main clock and the OSC3 oscillation
circuit generates the sub-clock when the CPU and
some peripheral circuits (output port, serial
interface and programmable timer) are in high
speed operation. Figure 5.3.1.1 shows the
configuration of the oscillation circuit.
5.3.3 OSC1 oscillation circuit
The OSC1 oscillation circuit generates the 32.768 kHz
(Typ.) system clock which is utilized during low
speed operation (low power mode) of the CPU and
peripheral circuits. Furthermore, even when OSC3 is
utilized as the system clock, OSC1 continues to
generate the source clock for the clock timer and
stopwatch timer.
This oscillation circuit stops when the SLP instruc-
tion is executed. However, in case the SVD circuit is
runninging at this time, oscillation is stopped in
synchronization with the completion of sampling.
In terms of the oscillation circuit types, either
crystal oscillation, CR oscillation, crystal oscillation
(gate capacitor built-in) or external clock input can
be selected with the mask option.
Figure 5.3.3.1 shows the configuration of the OSC1
oscillation circuit.
Fig. 5.3.1.1 Configuration of oscillation circuits
At initial reset, the OSC1 oscillation circuit is
selected for the CPU operating clock and the OSC3
oscillation circuit is in a stopped state. ON/OFF
switching of the OSC3 oscillation circuit and
switching of the system clock between OSC1 and
OSC3 are controlled in software. The OSC3 circuit
is utilized when high speed operation of the CPU
and some peripheral circuits become necessary.
Otherwise, OSC1 should be used to generate the
operating clock and the OSC3 circuit placed in a
stopped state in order to reduce current
consumption.
5.3.2 Mask option
OSC1 oscillation circuit
s
s Crystal oscillation circuit
s
s External clock input
s
s CR oscillation circuit
s
s Crystal oscillation circuit (gate capacitor built-in)
OSC3 oscillation circuit
s
s Crystal oscillation circuit
s
s Ceramic oscillation circuit
s
s CR oscillation circuit
s
s External clock input
In terms of the oscillation circuit types for OSC1,
either crystal oscillation, CR oscillation, crystal
oscillation (gate capacitor built-in) or external clock
input can be selected with the mask option.
In terms of oscillation circuit types for OSC3, either
crystal oscillation, ceramic oscillation, CR oscilla-
tion or external clock input can be selected with the
mask option, in the same way as OSC1.
(3) CR oscillation circuit
To CPU (CLK)
OSC1
oscillation circuit
Clock
switch
OSC3
oscillation circuit
To peripheral
circuit (fOSC1)
OSCC
Oscillation circuit
control signal
CLKCHG
CPU clock
selection signal
To some peripheral
circuit (fOSC3)
SLEEP
status
OSC2
OSC1
RCR1
fOSC1
SLEEP status
VSS
OSC2
OSC1
SLEEP status
fOSC1
X'tal1
VSS
fOSC1
VSS
OSC2
OSC1
X'tal1
CG1
SLEEP status
fOSC1
VSS
SLEEP status
OSC2
OSC1
External
clock
N.C.
VSS
VDD
(1) Crystal oscillation circuit
(2) External clock input
(4) Crystal oscillation circuit (gate capacitor built-in)
Fig. 5.3.3.1 OSC1 oscillation circuit
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| S-35390A-T8T1G | 功能描述:實(shí)時(shí)時(shí)鐘 2-Wire 1.3-5.5V RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| S-35390A-T8T1U | 功能描述:IC RTC CLK/CALENDAR I2C 8TSSOP 制造商:ablic u.s.a. inc. 系列:- 零件狀態(tài):在售 類型:時(shí)鐘/日歷 特性:警報(bào)器，閏年 存儲(chǔ)容量:- 時(shí)間格式:HH：MM：SS（12/24 小時(shí)） 日期格式:YY-MM-DD-dd 接口:I2C，2 線串口 電壓 - 電源:1.3 V ~ 5.5 V 電壓 - 電源，電池:- 電流 - 計(jì)時(shí)（最大）:14μA ~ 30μA @ 3V ~ 5V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商器件封裝:8-TSSOP 標(biāo)準(zhǔn)包裝:1 |
| S-35391A-I8T1U | 功能描述:IC RTC CLK/CALENDAR I2C SNT-8A 制造商:ablic u.s.a. inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:時(shí)鐘/日歷 特性:警報(bào)器，閏年 存儲(chǔ)容量:- 時(shí)間格式:HH：MM：SS（12/24 小時(shí)） 日期格式:YY-MM-DD-dd 接口:I2C，2 線串口 電壓 - 電源:1.3 V ~ 5.5 V 電壓 - 電源，電池:- 電流 - 計(jì)時(shí)（最大）:14μA ~ 30μA @ 3V ~ 5V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SMD，扁平引線 供應(yīng)商器件封裝:SNT-8A 標(biāo)準(zhǔn)包裝:1 |
| S-35392A | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:2-WIRE REAL-TIME CLOCK |
| S-35392A-I8T1G | 功能描述:實(shí)時(shí)時(shí)鐘 2-wire 實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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