Datasheet > 54ACT715D

54ACT715D

更新时间： 2023-01-02 17:18:02

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
16页	323K
描述
SPECIALTY CONSUMER CIRCUIT, CDIP20, CERAMIC, DIP-20

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54ACT715D 数据手册

Signal Specification (Continued)

DS100232-5

FIGURE 2. Vertical Waveform Specification

DS100232-12

FIGURE 3. Equalization/Serration Interval Programming

HORIZONTAL AND VERTICAL GATING SIGNALS

Addressing Logic

Horizontal Drive and Vertical Drive outputs can be utilized as

general purpose Gating Signals. Horizontal and Vertical Gat-

ing Signals are available for use when Composite Sync and

Blank signals are selected and the value of Bit 2 of the Sta-

tus Register is 0. The Vertical Gating signal will change in the

same manner as that specified for the Vertical Blank.

The register addressing logic is composed of two blocks of

logic. The first is the address register and counter (AD-

DRCNTR), and the second is the address decode (AD-

DRDEC).

ADDRCNTR LOGIC

Horizontal Gating Signal Width

[REG(16) − REG(15)] x

ckper

Addresses for the data registers can be generated by one of

two methods. Manual addressing requires that each byte of

each register that needs to be loaded needs to be ad-

dressed. To load both bytes of all 19 registers would require

a total of 57 load cycles (19 address and 38 data cycles).

Auto Addressing requires that only the initial register value

be specified. The Auto Load sequence would require only 39

load cycles to completely program all registers (1 address

and 38 data cycles). In the auto load sequence the low order

byte of the data register will be written first followed by the

high order byte on the next load cycle. At the time the High

Byte is written the address counter is incremented by 1. The

counter has been implemented to loop on the initial value

loaded into the address register. For example: If a value of 0

was written into the address register then the counter would

count from 0 to 18 before resetting back to 0. If a value of 15

was written into the address register then the counter would

count from 15 to 18 before looping back to 15. If a value

greater than or equal to 18 is placed into the address register

the counter will continuously loop on this value. Auto ad-

dressing is initiated on the falling edge of LOAD when AD-

DRDATA is 0 and LHBYTE is 1. Incrementing and loading of

data registers will not commence until the falling edge of

LOAD after ADDRDATA goes to 1. The next rising edge of

Vertical Gating Signal Width:

[REG(18) − REG(17)] x

hper

CURSOR POSITION AND VERTICAL INTERRUPT

The Cursor Position and Vertical Interrupt signal are avail-

able when Composite Sync and Blank signals are selected

and Bit 2 of the Status Register is set to the value of 1. The

Cursor Position generates a single pulse of n clocks wide

during every line that the cursor is specified. The signals are

generated by logically ORing (ANDing) the active LOW

(HIGH) signals specified by the registers used for generating

Horizontal and Vertical Gating signals. The Vertical Interrupt

signal generates a pulse during the vertical interval speci-

fied. The Vertical Interrupt signal will change in the same

manner as that specified for the Vertical Blanking signal.

Horizontal Cursor Width [REG(16) − REG(15)] x ckper

Vertical Cursor Width [REG(18) − REG(17)] x hper

Vertical Interrupt Width [REG(14) − REG(13)] x hper

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1 2 3 456 7 8...16

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与54ACT715D相关器件

型号	品牌	获取价格	描述	数据表
54ACT715DM	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, CDIP20, CERAMIC, DIP-20
54ACT715DMQB	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, CDIP20, CERAMIC, DIP-20, Consumer IC:Other
54ACT715DMQB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, CDIP20, CERAMIC, DIP-20
54ACT715L	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, CQCC20, CERAMIC, LCC-20
54ACT715LMQB	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, CQCC20, CERAMIC, LCC-20, Consumer IC:Other
54ACT715LMQB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, CQCC20, CERAMIC, LCC-20
54ACT715P	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PDIP20, PLASTIC, DIP-20
54ACT715-R	NSC	获取价格	Programmable Video Sync Generator
54ACT715-RD	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, CDIP20, CERAMIC, DIP-20
54ACT715-RDM	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, CDIP20, CERAMIC, DIP-20

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