參數(shù)資料
型號: UPD780824
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 19/52頁
文件大?。?/td> 345K
代理商: UPD780824
19
μ
PD780232
Data Sheet U13415EJ2V0DS
Figure 5-8. Serial Interface SIO3 Block Diagram
5.6 VFD Controller/Driver
A VFD controller/driver with the following functions is incorporated.
(a) Total number of display outputs: 53. Output of 16 patterns is enabled.
(b) 112-byte display RAM is provided to enable display signal output by reading display data automatically (direct
memory access (DMA)).
(c) A port pin that is not used for VFD display can be used as an output port or an I/O port (except for FIP0 to
FIP23, which are VFD output-only pins).
(d) The luminance can be adjusted in 8 levels using display mode register 1 (DSPM1).
(e) Hardware taking into consideration the key scan application is incorporated.
(f)
Whether the key scan timing is inserted or not is selectable.
(g) A high-tolerance output buffer (VFD driver) that can drive the VFD directly is incorporated.
(h) VFD output pins can incorporate a pull-down resistor, set by a mask option.
f
X
/2
2
to f
X
/2
4
INTCSI3
SO3/P21
SCK3/P20
S
Internal bus
Serial shift register 3 (SIO3)
Serial
clock counter
Interrupt request
signal generator
Serial clock
controller
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