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| 型号： | SAB-XC164KM-4F20F |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | PLASTIC, TQFP-64 |
| 文件页数： | 54/62页 |
| 文件大小： | 579K |
| 代理商： | SAB-XC164KM-4F20F |
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XC164KM
Derivatives
Electrical Parameters
Data Sheet
56
V1.0, 2005-11
4.3.2
On-chip Flash Operation
The XC164KM’s Flash module delivers data within a fixed access time (see Table 4-7).
Accesses to the Flash module are controlled by the PMI and take 1+WS clock cycles,
where WS is the number of Flash access waitstates selected via bitfield WSFLASH in
register IMBCTRL. The resulting duration of the access phase must cover the access
time
t
ACC of the Flash array. The required Flash waitstates depend on the actual system
frequency.
Note: The Flash access waitstates only affect non-sequential accesses. Due to
prefetching mechanisms, the performance for sequential accesses (depending on
the software structure) is only partially influenced by waitstates.
In typical applications, eliminating one waitstate increases the average
performance by 5% … 15%.
Example: For an operating frequency of 40 MHz (clock cycle = 25 ns), the Flash
accesses must be executed with 1 waitstate: ((1+1)
× 25 ns) ≥ 50 ns.
indicates the interrelation of waitstates and system frequency.
Note: The maximum achievable system frequency is limited by the properties of the
respective derivative, i.e. 40 MHz (or 20 MHz for XC164KM-xF20F devices).
Table 4-7
Flash Characteristics
(Operating Conditions apply)
Parameter
Symbol
Limit Values
Unit
Min.
Typ.
Max.
Flash module access time
t
ACC
CC ––50
1)
1) The actual access time is influenced by the system frequency, see Table 4-8.
ns
Programming time per 128-byte block
t
PR
CC –
2
2)
2) Programming and erase time depends on the system frequency. Typical values are valid for 40MHz.
5ms
Erase time per sector
t
ER
CC –
200
500
ms
Table 4-8
Flash Access Waitstates
Required Waitstates
Frequency Range
0 WS (WSFLASH = 00
B)
f
CPU ≤ 20 MHz
1 WS (WSFLASH = 01
B)
f
CPU ≤ 40 MHz
相关PDF资料 |
PDF描述 |
|---|---|
| SAK-XC164KM-4F40F | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64 |
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| SAK-XC164TM-8F40F | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SAB-XC167CI-16F20F | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bi t Single-Chip Microcontroller Preliminary |
| SAB-XC167CI-16F40F | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bi t Single-Chip Microcontroller Preliminary |
| SAC | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:Low Capacitance Transient Voltage Suppressor Diodes |
| SAC 8250 | 制造商:Edsyn International 功能描述:Bulk |
| SAC+0107 | 制造商:AIM Metals & Alloys LP 功能描述:Solder Bar-2.5lbs. 制造商:AIM PRODUCTS LLC. 功能描述:Solder Bar-2.5lbs. |
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