参数资料
型号: SAB-C515-L24N
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 24 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 93/162页
文件大小: 771K
代理商: SAB-C515-L24N
Semiconductor Group
4-8
External Bus Interface
C515
condition is stored internally. After each 16th data byte the cumulated verify result (pass or fail) of
the last 16 verify operations is output at P3.5. This means that P3.5 stays at static level (low for fail
and high for pass) during the 16 bytes are checked. In ROM verification mode 2, the C515 must be
provided with a system clock at the XTAL pins.
Figure 4-5 shows an application example of an external circuitry which allows to verify a protected
ROM inside the C515-1R in ROM verification mode 2. With RESET going inactive, the C515-1R
starts the ROM verify sequence. Its ALE is clocking a 13-bit address counter. This counter
generates the addresses for an external EPROM which is programmed with the contents of the
internal (protected) ROM. The verify detect logic typically displays the pass/fail information of the
verify operation. P3.5 can be latched with the falling edge of ALE.
When the last byte of the internal ROM has been handled, the C515-1R starts generating a PSEN
signal. This signal or the CY signal of the address counter indicate to the verify detect logic the end
of the internal ROM verification.
Figure 4-5
ROM Verification Mode 2 - External Circuitry Example
MCS03223
&
CC
V
Carry
S
2k
W
A0
CS
OE
D0
P3.5
ALE
RESET
0
Port
C515-1R
CC
V
EA
PSEN
CLK
-
- A12
D7
Logic
Detect
Verify
Address
Bit
Counter
13-
Compare
Code
ROM
相关PDF资料
PDF描述
SAF-C515-RM 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP80
SAF-C515-LN 8-BIT, 16 MHz, MICROCONTROLLER, PQCC68
SAH-C515-LN 8-BIT, 16 MHz, MICROCONTROLLER, PQCC68
SAB-C515-LM 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80
SAB-C515C-LM 8-BIT, 10 MHz, MICROCONTROLLER, PQFP80
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