參數(shù)資料
型號(hào)： HMS99C54S
廠商： Electronic Theatre Controls, Inc.
英文描述： 8-BIT SINGLE-CHIP MICROCONTROLLERS WITH EMBEDDED FLASH
中文描述： 8位單片機(jī)與嵌入式閃存微控制器
文件頁(yè)數(shù)： 6/73頁(yè)
文件大?。?/td> 696K
代理商： HMS99C54S
HMS99C51S/52S/54S/56S/58S
2
Sep. 2004 Ver 1.01
FEATURE
Fully compatible to standard MCS-51 microcontroller
Wide operating frequency up to 40MHz
(for more detail, See “HMS99C51S/52S/54S/56S/58S SELECTION GUIDE” on page 1)
X2 Speed Improvement capability (
X2 Mode : 6 clocks/machine cycle
)
20MHz @5V (Equivalent to 40MHz @5V)
ISP(In-System Programming) using Standard V
CC
Power Supply
Boot ROM Contains Low Level FLASH Programming Routines and a Default Serial Loader
4K/8K/16K/24K/32K bytes FLASH user program memory
- Byte Write and Block(2K, 8K Bytes) Erase
2K bytes FLASH boot loader
1 byte Hardware Security Byte (HSB)
256 bytes RAM
64K bytes external program memory space
64K bytes external data memory space
Four 8-bit ports
Three 16-bit Timers / Counters (Timer2 with up/down counter feature)
UART
One clock output port
Programmable ALE pin enable / disable (Low
EMI
)
Six interrupt sources, two priority levels
Power saving Idle and power down mode
P-DIP-40, P-LCC-44, P-MQFP-44 package
Temperature Ranges :
-40
°
C ~ 85
°
C
Description
The Flash memory increases EPROM and ROM functionality with in-circuit electrical erasure and program-
ming. It contains 4K, 8K, 16K, 24K or 32K bytes of program memory. This memory is both parallel and serial
In-System Programmable(ISP). The ISP allows devices to alter their own program memory in the actual end
product under software control through UART ports. A default serial loader(bootloader) program supports ISP
of the Flash memory. The programming does not require external 12V programming voltage. The necessary
high programming voltage is generated on-chip using the standard V
CC
pins of the microcontroller.
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