cop8sce9 National Semiconductor Corporation, cop8sce9 Datasheet - Page 14
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cop8sce9
Manufacturer Part Number
cop8sce9
Description
8-bit Cmos Flash Microcontroller With 8k Memory, Virtual Eeprom And Brownout Reset
Manufacturer
National Semiconductor Corporation
Datasheet
1.COP8SCE9.pdf
(70 pages)
- Current page: 14 of 70
- Download datasheet (901Kb)
www.national.com
3.0 Pin Descriptions
L7 Multi-Input Wake-up
L6 Multi-Input Wake-up
L5 Multi-Input Wake-up or T2B (Timer T2B Input)
L4 Multi-input Wake-up or T2A (Timer T2A Input)
L3 Multi-Input Wake-up and/or RDX (USART Receive)
L2 Multi-Input Wake-up or TDX (USART Transmit)
L1 Multi-Input Wake-up and/or CKX (USART Clock) (Low
L0 Multi-Input Wake-up (Low Speed Oscillator Input)
FIGURE 4. I/O Port Configurations — Output Mode
Speed Oscillator Output)
FIGURE 3. I/O Port Configurations
(Continued)
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14
3.1 EMULATION CONNECTION
Connection to the emulation system is made via a 2 x 7
connector which interrupts the continuity of the RESET, G0,
G1, G2 and G3 signals between the COP8 device and the
rest of the target system (as shown in Figure 6 ). This con-
nector can be designed into the production pc board and can
be replaced by jumpers or signal traces when emulation is
no longer necessary. The emulator will replicate all functions
of G0 - G3 and RESET. For proper operation, no connection
should be made on the device side of the emulator connec-
tor.
4.0 Functional Description
The architecture of the device is a modified Harvard archi-
tecture. With the Harvard architecture, the program memory
(Flash) is separate from the data store memory (RAM). Both
Program Memory and Data Memory have their own separate
addressing space with separate address buses. The archi-
tecture, though based on the Harvard architecture, permits
transfer of data from Flash Memory to RAM.
FIGURE 5. I/O Port Configurations — Input Mode
FIGURE 6. Emulation Connection
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