Texas Instruments MSP50C6xx - Manual (Page 292)

Instruction Set Summay 4-206
Assembly Language Instructions
MSP50C614 (MSP50P614) IO Port Description
Address Bits Name R/W 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 After RESET
0x00 8 Port A Data
( )
R/W A7 A6 A5 A4 A3 A2 A1 A0 external
(bidirectional)
bit Ax = 0 ⇒ PAx low bit Ax = 1 ⇒ PAx high
input states
0x04 8 Port A Control R/W C C C C C C C C 0x00
bit C = 0 ⇒ PAx as input bit C = 1 ⇒ PAx as output
0x08 8 Port B Data
(bidi i l)
R/W B7 B6 B5 B4 B3 B2 B1 B0 external
i (bidirectional)
bit Bx = 0 ⇒ PBx low bit Bx = 1 ⇒ PBx high
input states
0x0C 8 Port B Control R/W C C C C C C C C 0x00
bit C = 0 ⇒ PBx as input bit C = 1 ⇒ PBx as output
0x10 8 Port C Data
( )
R/W C7 C6 C5 C4 C3 C2 C1 C0 external
(bidirectional)
bit Cx = 0
⇒
PCx low bit Cx = 1
⇒
PCx high
input states
0x14 8 Port C Control R/W C C C C C C C C 0x00
bit C = 0 ⇒ PCx as input bit C = 1 ⇒ PCx as output
0x18 8 Port D Data
f
R/W D7 D6 D5† D4† D3 D2 D1 D0 external
multifunction port
(bidirectional)
↓ falling edge ↑ rising edge bit Dx = 0 ⇒ PDx low bit Dx = 1 ⇒ PDx high
input states
(bidirectional)
†PD4 = inverting and PD5 = positive comparator inputs if CE=1 in IO 0x38
PD4 ↑ triggers INT6 PD5 ↓ triggers INT7 PD2 ↑ triggers INT3 PD3 ↓ triggers INT4
0x1C 8 Port D Control
f
R/W C C C‡ C‡ C‡ C‡ C C 0x00
multifunction control
‡C=0 for interrupts (IO 0x18) bit C = 0
⇒
PDx as input bit C = 1
⇒
PDx as output
0x20 8 Port E Data
( )
R/W E7 E6 E5 E4 E3 E2 E1 E0 external
(bidirectional)
bit Ex = 0 ⇒ PEx low bit Ex = 1 ⇒ PEx high
input states
0x24 8 Port E Control R/W C C C C C C C C 0x00
bit C = 0 ⇒ PDx as input bit C = 1 ⇒ PDx as output
0x28 8 Port F Data
( )
R F7 F6 F5 F4 F3 F2 F1 F0 external
(input only)
Fx
↓
triggers INT5 bit Fx = 0
⇒
input PFx low bit Fx = 1
⇒
input PFx high
input states
0x2C 16 Port G Data
( )
R/W G15 G14 G13 G12 G11 G10 G9 G8 G7 G6 G5 G4 G3 G2 G1 G0 0x00
(output only)
bit Gx = 0 ⇒ PGx low (output only) bit Gx = 1 ⇒ PGx high (output only)
all 0 outputs
0x2F 8 RTOTRIM
‡MSP C l
R T4 T3 T2 T1 T0 unaffected
‡MSP50C614 only
T4–T0 = Resistor trim bits V = 1 ⇒ T4–T0 are valid
0x30 16 DAC Data R/W S O O D D D D D D D D D D – – –§ 0x0000
S O O D D D D D D D D D – – – –¶
S O O D D D D D D D D – – – – – #
S = sign bit O = overflow bit D = data bit – = dont care
§ 10 bit DAC ¶ 9 bit DAC # 8 bit DAC see P1,P0 in IO 0x34