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參數(shù)資料
| 型號(hào)： | UPD78361ACW |
| 廠商： | NEC Corp. |
| 英文描述： | 16/8-BIT SINGLE-CHIP MICROCONTROLLER |
| 中文描述： | 16/8-BIT單片機(jī) |
| 文件頁數(shù)： | 26/88頁 |
| 文件大?。?/td> | 782K |
| 代理商： | UPD78361ACW |
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26
μ
PD78361A, 78362A
3.
FUNCTIONAL BLOCKS
3.1
EXECUTION UNIT (EXU)
EXU controls address computation, arithmetic and logical operations, and data transfer through microprogram.
EXU has an internal main RAM. This RAM can be accessed by instructions faster than the peripheral RAM.
3.2
BUS CONTROL UNIT (BCU)
BCU starts necessary bus cycles according to the physical address obtained by the execution unit (EXU).If
EXU does not request start of the bus cycle, an address is generated to prefetch an instruction. The prefetched
op code is stored in an instruction queue.
3.3
ROM/RAM
Internal ROM and RAM capacities differ depending on the product.
The
μ
PD78361A has a 32K-byte ROM and a 1792-byte peripheral RAM.
The
μ
PD78362A has a 24K-byte ROM and a 512-byte peripheral RAM.
3.4
PORT FUNCTIONS
The
μ
PD78362A is provided with the ports shown in Figure 3-1 for various control operations.
The functions of each port are listed in Table 3-1. These ports function not only as digital ports but also as
input/output lines of the internal hardware.
Figure 3-1. Port Configuration
P00
P07
P20
P25
P30
P34
8
8
P50
P57
P70-P77
P80
P85
P90
P92
P40-P47
Port 0
Port 2
Port 3
Port 4
Port 5
Port 8
Port 7
Port 9
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