COM20022V-HT データシートの表示（PDF） - SMSC -> Microchip

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COM20022V-HT

10Mbps ARCNET controller with 2Kx8 on-board RAM

SMSC -> Microchip 

BIT

BIT NAME

7-0 Terminal Count

Timer Mode

Cycle Mode

Table 14 – DMA Count Register

SYMBOL

DESCRIPTION

TC7-TC0

TC7-TC0: Used for non-burst or burst mode. These are the

lower 8 bits of the Terminal Count setting register. The MSB

(TC8) is in the Bus Control Register. The Terminal Count

setting range is from 1 to 512 counts (TC8 - TC0 all zeroes

means 512 counts).

TIM7-TIM0

CYC7-

CYC0

TIM7-TIM0: Used for Programmable-Burst by Timer mode.

These bits are for setting the term of the continuous DMA

transfer. The time range is from 100nS to 25.6#S. The step

is 100nS (TIM7-TIM0 all zeroes means 25.6#s).

CYC7-CYC0: Used for Programmable-Burst by Cycle mode.

These bits are for setting the term of the continuous DMA

transfer. The cycle range is from 2 to 256 cycles. CYC7-

CYC0 all zeroes means 256 cycles. (1 is illegal)

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