SYM53C040 DATA MANUAL VERSION 2.0
8-23
PRELIMINARY
System Register FF40h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Register FF41h
System Register FF40h
Multi-Purpose LED Bank 2L Output (MLO2L)
Read/write
Bits 7-0 MLO2_3A, MLO2_3B, MLO2_2A, MLO2_2B, MLO2_1A, MLO2_1B,
MLO2_0A, MLO2_0B (Multi-purpose LED Bank 2L Output)
These bits control the Multi-Purpose LED Bank 2 pins MPLED2_0, MPLED2_1,
MPLED2_2, and MPLED2_3. Two bits control each LED, according
to Table 8-7.
The slow blink and fast blink rates are defined in the LBR register FF02h. All LED pins
have 16 mA open-drain drivers. Turning the LED off (mlox_xa = 0 and mlox_xb = 0)
effectively tri-states the driver.
System Register FF41h
Multi-Purpose LED Bank 2H Output (MLO2H)
Read/write
Bits 7-0 MLO2_7A, MLO2_7B, MLO2_6A, MLO2_6B, MLO2_5A, MLO2_5B,
MLO2_4A, MLO2_4B (Multi-Purpose LED Bank 2H Output)
These bits control the Multi-Purpose LED Bank 2 pins MPLED2_4, MPLED2_5,
MPLED2_6, and MPLED2_7. Two bits control each LED, according
to Table 8-The slow blink and fast blink rates are defined in the LBR register FF02h. All LED pins
have 16 mA open-drain drivers. Turning the LED off (mlox_xa = 0 and mlox_xb = 0)
effectively tri-states the driver.
MLO2_3A
MLO2_3B
MLO2_2A
MLO2_2B
MLO2_1A
MLO2_1B
ML02_0A
MLO2_0B
76543210
Default:
00000000
Table 8-7
LED Bank 2 behavior
MLOx_xA
MLOx_xB
LED behavior
00
OFF
0
1
slow blink
1
0
fast blink
1
CONSTANT ON
ML02_7A
MLO2_7B
MLO2_6A
MLO2_6B
MLO2_5A
MLO2_5B
ML02_4A
MLO2_4B
76543210
Default:
00000000