C8051F91X-C8051F90X View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

MFG CO.

C8051F91X-C8051F90X

Single/Dual Battery, 0.9–3.6 V, 16–8 kB, SmaRTClock, 12/10-Bit ADC MCU

Silicon Laboratories 

C8051F91x-C8051F90x

SFR Definition 16.3. DC0MD: DC-DC Mode

Bit

7

6

5

4

3

2

1

0

Name

BYPFLG

BYPSEL[1:0]

PASDEN

Type R/W

R/W

R/W

R/W

R

R/W

R/W

Reset

0

0

0

0

Varies

0

0

0

SFR Page = 0xF; SFR Address = 0x94

Bit

Name

Function

7:4 Unused Unused.

Read = 0000b, Write = don’t care.

3 BYPFLG Bypass Indicator.

Indicates when the dc-dc converter is operating in bypass mode. Only available on

‘F912 and ‘F902 devices.

0: DC0 is not operating in bypass mode.

1: DC0 is operating in bypass mode.

2:1 BYPSEL[1:0] Bypass Mode Select.

Selects the bypass settings. Only available on ‘F912 and ‘F902 devices.

00: Bypass mode disabled (highest supply current when the input voltage exceeds

the programmed output voltage).

01: Bypass enabled (auto switch), dc-dc oscillator enabled (fast response time)

10: Bypass enabled (auto switch), dc-dc oscillator disabled (reduced supply current)

11: The dc-dc converter is forced into bypass mode (lowest supply current when the

input voltage exceeds the programmed output voltage).

0 PASDEN Passive Diode Mode Enable.

Passive external diode mode. Only available on ‘F912 and ‘F902 devices.

0: Passive diode mode disabled.

1: Passive diode mode enabled.

16.13. DC-DC Converter Specifications

See Table 4.16 on page 60 for a detailed listing of dc-dc converter specifications.

Rev. 1.0

169

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