參數(shù)資料
型號： CY7C63823
廠商： Cypress Semiconductor Corp.
英文描述： enCoRe II Low-Speed USB Peripheral Controller(enCoRe II低速USB外設(shè)控制器)
中文描述： enCoRe II還低速USB外設(shè)控制器（enCoRe II還低速的USB外設(shè)控制器）
文件頁數(shù)： 39/74頁
文件大小： 1441K
代理商： CY7C63823
CY7C63310
CY7C638xx
Document 38-08035 Rev. *I
Page 39 of 74
16.0
Timer Registers
All timer functions of the enCoRe II are provided by a single timer block. The timer block is asynchronous from the CPU clock.
16.1
Registers
16.1.1
The 16 bit free-running counter is clocked by the Timer Capture Clock (TCAPCLK). It can be read in software for use as a general-
purpose time base. When the low-order byte is read, the high-order byte is registered. Reading the high-order byte reads this
register allowing the CPU to read the 16-bit value atomically (loads all bits at one time). The free-running timer generates an
interrupt at 1024-
μ
s rate when clocked by a 4MHz source. It can also generate an interrupt when the free-running counter overflow
occurs—every 16.384 ms(with a 4MHz source). This allows extending the length of the timer in software..
Free Running Counter
Table 15-4. SPI SCLK Frequency
SCLK
Select
CPUCLK
Divisor
SCLK Frequency when CPUCLK =
12 MHz
2 MHz
1 MHz
250 KHz
125 KHz
24 MHz
4 MHz
2 MHz
500 KHz
250 KHz
00
01
10
11
6
12
48
96
Figure 16-1. 16-bit Free Running Counter Block Diagram
Timer Capture
Clock
16-bit Free
Running Counter
Overflow
Interrupt/Wrap
Interrupt
1024
μs Timer
Interrupt
Table 16-1. Free-running Timer Low-order Byte (FRTMRL) [0x20] [R/W]
Bit #
7
6
5
4
3
2
1
0
Field
Free-running Timer [7:0]
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
Bit [7:0]:
Free-running Timer [7:0]
This register holds the low-order byte of the 16-bit free-running timer. Reading this register causes the high-order byte to be
moved into a holding register allowing an automatic read of all 16 bits simultaneously.
For reads, the actual read occurs in the cycle when the low order is read. For writes, the actual time the write occurs is the cycle
when the high order is written.
When reading the Free Running Timer, the low-order byte must be read first and the high-order second. When writing, the low-
order byte must be written first then the high-order byte
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY7C63823-3XWC 制造商:Cypress Semiconductor 功能描述:USB - Bulk 制造商:Cypress Semiconductor 功能描述:Bulk / USB Low-Speed Peripherals
CY7C638234-SXC 功能描述:IC USB CONTROLLERS RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A
CY7C638235-SXC 制造商:Rochester Electronics LLC 功能描述: 制造商:Cypress Semiconductor 功能描述:
CY7C63823-PXC 功能描述:IC USB PERIPHERAL CTRLR 24-DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:CY7C 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A
CY7C63823-QXC 功能描述:USB 接口集成電路 USB Peripheral Cntrl 8K/256 24-QSOP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
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